Merge branch 'machine_learning' of git.suuppl.dev:seppl/optical-regeneration into machine_learning

.gitmodules

@@ -1,3 +1,4 @@
 [submodule "pypho"]
 	path = pypho
 	url = git@gitlab.lrz.de:000000003B9B3E61/pypho.git
+	branch = main

src/single-core-data-gen/generate_signal.py

@@ -33,7 +33,7 @@ flags = "FFTW_PATIENT"
 nthreads = 32
 
 [fiber]
-length = 80000
+length = 10000
 gamma = 1.14
 alpha = 0.2
 D = 17
@@ -201,7 +201,7 @@ def initialize_fiber_and_data(config, input_data_override=None):
             "jitter_seed", (int(time.time() * 1000)) % 2**32
         )
         symbolsrc = pypho.symbols(
-            py_glova, py_glova.nos, pattern="ones", seed=config["signal"]["seed"]
+            py_glova, py_glova.nos, pattern="random", p1=config["signal"]["mod_order"], seed=config["signal"]["seed"]
         )
         laser = pypho.lasmod(
             py_glova, power=config["signal"]["laser_power"]+1.5, Df=0, theta=np.pi / 4
@@ -214,8 +214,8 @@ def initialize_fiber_and_data(config, input_data_override=None):
             seed=config["signal"]["jitter_seed"],
         )
 
-        symbols_x = symbolsrc(pattern="random", p1=config["signal"]["mod_order"])
+        symbols_x = symbolsrc()
-        symbols_y = symbolsrc(pattern="random", p1=config["signal"]["mod_order"])
+        symbols_y = symbolsrc()
         symbols_x[:3] = 0
         symbols_y[:3] = 0
 

src/single-core-regen/hypertraining/hypertraining.py

@@ -258,12 +258,12 @@ class HyperTraining:
                     f"model_hidden_dim_{i}",
                     self.model_settings.n_hidden_nodes,
                 )
-            layers.append(util.complexNN.SemiUnitaryLayer(last_dim, hidden_dim, dtype=dtype))
+            layers.append(util.complexNN.ONNRect(last_dim, hidden_dim, dtype=dtype))
             last_dim = hidden_dim
             layers.append(getattr(util.complexNN, afunc)())
             n_nodes += last_dim
 
-        layers.append(util.complexNN.SemiUnitaryLayer(last_dim, self.model_settings.output_dim, dtype=dtype))
+        layers.append(util.complexNN.ONNRect(last_dim, self.model_settings.output_dim, dtype=dtype))
 
         model = nn.Sequential(*layers)
 

src/single-core-regen/hypertraining/settings.py

@@ -11,7 +11,7 @@ class GlobalSettings:
 # data settings
 @dataclass
 class DataSettings:
-    config_path: str # = "data/*-128-16384-100000-0-0-17-0-PAM4-0.ini"
+    config_path: tuple | list | str # = "data/*-128-16384-100000-0-0-17-0-PAM4-0.ini"
     dtype: tuple = ("complex64", "float64")
     symbols: tuple | float | int = 8
     output_size: tuple | float | int = 64
@@ -39,7 +39,7 @@ class PytorchSettings:
     summary_dir: str = ".runs"
     write_every: int = 10
     head_symbols: int = 40
-    eye_symbols: int = 400
+    eye_symbols: int = 1000
 
 
 # model settings
@@ -52,13 +52,16 @@ class ModelSettings:
     overrides: dict = field(default_factory=dict)
     dropout_prob: float | None = None
     model_layer_function: str | None = None
+    scale: bool = False
+    model_layer_kwargs: dict | None = None
     model_layer_parametrizations: list= field(default_factory=list)
 
 
 @dataclass
 class OptimizerSettings:
     optimizer: tuple | str = ("Adam", "RMSprop", "SGD")
-    learning_rate: tuple | float = (1e-5, 1e-1)
+    optimizer_kwargs: dict | None = None
+    # learning_rate: tuple | float = (1e-5, 1e-1)
     scheduler: str | None = None
     scheduler_kwargs: dict | None = None
 

src/single-core-regen/hypertraining/training.py

@@ -1,8 +1,10 @@
 import copy
 from datetime import datetime
 from pathlib import Path
+import random
 from typing import Literal
 import matplotlib
+from matplotlib.colors import LinearSegmentedColormap
 import torch.nn.utils.parametrize
 
 try:
@@ -50,6 +52,7 @@ class regenerator(nn.Module):
         self,
         *dims,
         layer_function=util.complexNN.ONN,
+        layer_kwargs: dict | None = None,
         layer_parametrizations: list[dict] = None,
         # [
         #     {
@@ -64,6 +67,7 @@ class regenerator(nn.Module):
         activation_function=util.complexNN.Pow,
         dtype=torch.float64,
         dropout_prob=0.01,
+        scale=False,
         **kwargs,
     ):
         super(regenerator, self).__init__()
@@ -74,39 +78,57 @@ class regenerator(nn.Module):
                 raise ValueError("dims must be provided")
         self._n_hidden_layers = len(dims) - 2
         self._layers = nn.Sequential()
+        if layer_kwargs is None:
+            layer_kwargs = {}
+        # self.powers = []
 
         for i in range(self._n_hidden_layers + 1):
-            self._layers.append(layer_function(dims[i], dims[i + 1], dtype=dtype))
+            if scale:
+                self._layers.append(util.complexNN.Scale(dims[i]))
+            self._layers.append(layer_function(dims[i], dims[i + 1], dtype=dtype, **layer_kwargs))
             if i < self._n_hidden_layers:
                 if dropout_prob is not None:
                     self._layers.append(util.complexNN.DropoutComplex(p=dropout_prob))
-                self._layers.append(activation_function())
+                self._layers.append(activation_function(bias=True, size=dims[i + 1]))
+        
+        self._layers.append(util.complexNN.Scale(dims[-1]))
 
         # add parametrizations
         if layer_parametrizations is not None:
+            for layer in self._layers:
                 for layer_parametrization in layer_parametrizations:
                     tensor_name = layer_parametrization.get("tensor_name", None)
                     parametrization = layer_parametrization.get("parametrization", None)
                     param_kwargs = layer_parametrization.get("kwargs", {})
-                    if (
+                    if tensor_name is not None and tensor_name in layer._parameters and parametrization is not None:
-                        tensor_name is not None
+                        parametrization(layer, tensor_name, **param_kwargs)
-                        and tensor_name in self._layers[-1]._parameters
-                        and parametrization is not None
-                    ):
-                        parametrization(self._layers[-1], tensor_name, **param_kwargs)
 
-    def forward(self, input_x):
+    # def __call__(self, input_x, **kwargs):
+    #     return self.forward(input_x, **kwargs)
+
+    def forward(self, input_x, trace_powers=False):
         x = input_x
+
+        if trace_powers:
+            powers = [x.abs().square().sum()]
+
         # check if tracing
         if torch.jit.is_tracing():
             for layer in self._layers:
                 x = layer(x)
+                if trace_powers:
+                    powers.append(x.abs().square().sum())
         else:
             # with torch.nn.utils.parametrize.cached():
             for layer in self._layers:
                 x = layer(x)
+                if trace_powers:
+                    powers.append(x.abs().square().sum())
+        if trace_powers:
+            return x, powers
         return x
 
+
 def traverse_dict_update(target, source):
     for k, v in source.items():
         if isinstance(v, dict):
@@ -119,6 +141,7 @@ def traverse_dict_update(target, source):
             except TypeError:
                 target.__dict__[k] = v
 
+
 class Trainer:
     def __init__(
         self,
@@ -142,7 +165,7 @@ class Trainer:
             OptimizerSettings,
             PytorchSettings,
             regenerator,
-            torch.nn.utils.parametrizations.orthogonal
+            torch.nn.utils.parametrizations.orthogonal,
         ])
         if self.resume:
             self.checkpoint_dict = torch.load(checkpoint_path, weights_only=True)
@@ -206,6 +229,11 @@ class Trainer:
         }
 
     def define_model(self, model_kwargs=None):
+        if self.resume:
+            model_kwargs = self.checkpoint_dict["model_kwargs"]
+        else:
+            model_kwargs = model_kwargs
+
         if model_kwargs is None:
             n_hidden_layers = self.model_settings.n_hidden_layers
 
@@ -228,6 +256,7 @@ class Trainer:
                 "activation_function": afunc,
                 "dtype": dtype,
                 "dropout_prob": self.model_settings.dropout_prob,
+                "scale": self.model_settings.scale,
             }
         else:
             self.model_kwargs = model_kwargs
@@ -237,9 +266,12 @@ class Trainer:
         # dims = self.model_kwargs.pop("dims")
         self.model = regenerator(**self.model_kwargs)
 
+        if self.writer is not None:
             self.writer.add_graph(self.model, torch.zeros(1, input_dim, dtype=dtype))
 
         self.model = self.model.to(self.pytorch_settings.device)
+        if self.resume:
+            self.model.load_state_dict(self.checkpoint_dict["model_state_dict"], strict=False)
 
     def get_sliced_data(self, override=None):
         symbols = self.data_settings.symbols
@@ -253,11 +285,13 @@ class Trainer:
         dtype = getattr(torch, self.data_settings.dtype)
 
         num_symbols = None
+        config_path = self.data_settings.config_path
         if override is not None:
             num_symbols = override.get("num_symbols", None)
+            config_path = override.get("config_path", config_path)
         # get dataset
         dataset = FiberRegenerationDataset(
-            file_path=self.data_settings.config_path,
+            file_path=config_path,
             symbols=symbols,
             output_dim=data_size,
             target_delay=in_out_delay,
@@ -330,10 +364,11 @@ class Trainer:
             task = progress.add_task("-.---e--", total=len(train_loader))
             progress.start()
 
-        running_loss2 = 0.0
+        # running_loss2 = 0.0
         running_loss = 0.0
         self.model.train()
-        for batch_idx, (x, y) in enumerate(train_loader):
+        loader_len = len(train_loader)
+        for batch_idx, (x, y, _) in enumerate(train_loader):
             self.model.zero_grad(set_to_none=True)
             x, y = (
                 x.to(self.pytorch_settings.device),
@@ -344,24 +379,23 @@ class Trainer:
             loss_value = loss.item()
             loss.backward()
             optimizer.step()
-            running_loss2 += loss_value
+            # running_loss2 += loss_value
             running_loss += loss_value
 
             if enable_progress:
-                progress.update(task, advance=1, description=f"{loss_value:.3e}")
+                progress.update(task, advance=1, description=f"{running_loss/(batch_idx+1):.3e}")
 
             if batch_idx % self.pytorch_settings.write_every == 0:
                 self.writer.add_scalar(
                     "training loss",
-                    running_loss2 / (self.pytorch_settings.write_every if batch_idx > 0 else 1),
+                    running_loss / (batch_idx + 1),
-                    epoch * len(train_loader) + batch_idx,
+                    epoch * loader_len + batch_idx,
                 )
-                running_loss2 = 0.0
 
         if enable_progress:
             progress.stop()
 
-        return running_loss / len(train_loader)
+        return running_loss / (batch_idx + 1)
 
     def eval_model(self, valid_loader, epoch, enable_progress=True):
         if enable_progress:
@@ -384,7 +418,7 @@ class Trainer:
         self.model.eval()
         running_error = 0
         with torch.no_grad():
-            for batch_idx, (x, y) in enumerate(valid_loader):
+            for batch_idx, (x, y, _) in enumerate(valid_loader):
                 x, y = (
                     x.to(self.pytorch_settings.device),
                     y.to(self.pytorch_settings.device),
@@ -395,15 +429,17 @@ class Trainer:
                 running_error += error_value
 
                 if enable_progress:
-                    progress.update(task, advance=1, description=f"{error_value:.3e}")
+                    progress.update(task, advance=1, description=f"{error_value/(batch_idx+1):.3e}")
 
+        running_error /= (batch_idx+1)
 
-        running_error /= len(valid_loader)
         self.writer.add_scalar(
             "eval loss",
             running_error,
             epoch,
         )
+        if (epoch + 1) % 10 == 0 or epoch < 10:
+            # plotting is slow, so only do it every 10 epochs
             title_append, subtitle = self.build_title(epoch + 1)
             self.writer.add_figure(
                 "fiber response",
@@ -426,45 +462,74 @@ class Trainer:
                 ),
                 epoch + 1,
             )
-        self.writer_histograms(epoch + 1)
+
+            self.writer.add_figure(
+                "powers",
+                self.plot_model_response(
+                    model=self.model,
+                    title_append=title_append,
+                    subtitle=subtitle,
+                    mode="powers",
+                    show=False,
+                ),
+                epoch + 1,
+            )
+
+        self.write_parameters(epoch + 1)
+        self.writer.flush()
 
         if enable_progress:
             progress.stop()
 
         return running_error
 
-    def run_model(self, model, loader):
+    def run_model(self, model, loader, trace_powers=False):
         model.eval()
-        xs = []
+        fiber_out = []
-        ys = []
+        fiber_in = []
-        y_preds = []
+        regen = []
+        timestamps = []
+
         with torch.no_grad():
             model = model.to(self.pytorch_settings.device)
-            for x, y in loader:
+            for x, y, timestamp in loader:
                 x, y = (
                     x.to(self.pytorch_settings.device),
                     y.to(self.pytorch_settings.device),
                 )
-                y_pred = model(x).cpu()
+                if trace_powers:
+                    y_pred, powers = model(x, trace_powers).cpu()
+                else:
+                    y_pred = model(x, trace_powers).cpu()
                 # x = x.cpu()
                 # y = y.cpu()
                 y_pred = y_pred.view(y_pred.shape[0], -1, 2)
                 y = y.view(y.shape[0], -1, 2)
                 x = x.view(x.shape[0], -1, 2)
-                xs.append(x[:, 0, :].squeeze())
+                # timestamp = timestamp.view(-1, 1)
-                ys.append(y.squeeze())
+                fiber_out.append(x[:, x.shape[1] // 2, :].squeeze())
-                y_preds.append(y_pred.squeeze())
+                fiber_in.append(y.squeeze())
+                regen.append(y_pred.squeeze())
+                timestamps.append(timestamp.squeeze())
 
-        xs = torch.vstack(xs).cpu()
+        fiber_out = torch.vstack(fiber_out).cpu()
-        ys = torch.vstack(ys).cpu()
+        fiber_in = torch.vstack(fiber_in).cpu()
-        y_preds = torch.vstack(y_preds).cpu()
+        regen = torch.vstack(regen).cpu()
-        return ys, xs, y_preds
+        timestamps = torch.concat(timestamps).cpu()
+        if trace_powers:
+            return fiber_in, fiber_out, regen, timestamps, powers
+        return fiber_in, fiber_out, regen, timestamps
 
-    def writer_histograms(self, epoch, attributes=["weight", "weight_U", "weight_V", "bias", "sigma", "scale"]):
+    def write_parameters(self, epoch, attributes: list[str] | tuple[str] = None):
         for i, layer in enumerate(self.model._layers):
             tag = f"layer {i}"
-            for attribute in attributes:
+            if hasattr(layer, "parametrizations"):
-                if hasattr(layer, attribute):
+                attribute_pool = set(layer.parametrizations._modules) | set(layer._parameters)
+            else:
+                attribute_pool = set(layer._parameters)
+            for attribute in attribute_pool:
+                plot = (attributes is None) or (attribute in attributes)
+                if plot:
                     vals: np.ndarray = getattr(layer, attribute).detach().cpu().numpy().flatten()
                     if vals.ndim <= 1 and len(vals) == 1:
                         if np.iscomplexobj(vals):
@@ -483,14 +548,11 @@ class Trainer:
         if self.writer is None:
             self.setup_tb_writer()
 
-        if self.resume:
+        self.define_model()
-            model_kwargs = self.checkpoint_dict["model_kwargs"]
-        else:
-            model_kwargs = None
 
-        self.define_model(model_kwargs=model_kwargs)
+        print(
-
+            f"number of parameters (trainable): {sum(p.numel() for p in self.model.parameters())} ({sum(p.numel() for p in self.model.parameters() if p.requires_grad)})"
-        print(f"number of parameters (trainable): {sum(p.numel() for p in self.model.parameters())} ({sum(p.numel() for p in self.model.parameters() if p.requires_grad)})")
+        )
 
         title_append, subtitle = self.build_title(0)
 
@@ -515,36 +577,55 @@ class Trainer:
             ),
             0,
         )
-        self.writer_histograms(0)
+
+        self.writer.add_figure(
+            "powers",
+            self.plot_model_response(
+                model=self.model,
+                title_append=title_append,
+                subtitle=subtitle,
+                mode="powers",
+                show=False,
+            ),
+            0,
+        )
+
+        self.write_parameters(0)
+
+        self.writer.add_text("datasets", '\n'.join(self.data_settings.config_path))
+
+        self.writer.flush()
 
         train_loader, valid_loader = self.get_sliced_data()
 
         optimizer_name = self.optimizer_settings.optimizer
 
-        lr = self.optimizer_settings.learning_rate
+        # lr = self.optimizer_settings.learning_rate
 
-        self.optimizer: optim.Optimizer = getattr(optim, optimizer_name)(self.model.parameters(), lr=lr)
+        self.optimizer: optim.Optimizer = getattr(optim, optimizer_name)(
+            self.model.parameters(), **self.optimizer_settings.optimizer_kwargs
+        )
         if self.optimizer_settings.scheduler is not None:
             self.scheduler = getattr(optim.lr_scheduler, self.optimizer_settings.scheduler)(
                 self.optimizer, **self.optimizer_settings.scheduler_kwargs
             )
-            if self.resume:
+            # if self.resume:
-                try:
+            # try:
-                    self.scheduler.load_state_dict(self.checkpoint_dict["scheduler_state_dict"])
+            #     self.scheduler.load_state_dict(self.checkpoint_dict["scheduler_state_dict"])
-                except ValueError:
+            # except ValueError:
-                    pass
+            #     pass
-            self.writer.add_scalar("learning rate", self.scheduler.get_last_lr()[0], -1)
+        self.writer.add_scalar("learning rate", self.optimizer.param_groups[0]["lr"], -1)
-            
 
         if not self.resume:
             self.best = self.build_checkpoint_dict()
         else:
             self.best = self.checkpoint_dict
-            self.model.load_state_dict(self.best["model_state_dict"], strict=False)
+            self.best["loss"] = float("inf")
-            try:
+            # self.model.load_state_dict(self.best["model_state_dict"], strict=False)
-                self.optimizer.load_state_dict(self.best["optimizer_state_dict"])
+            # try:
-            except ValueError:
+            #     self.optimizer.load_state_dict(self.best["optimizer_state_dict"])
-                pass
+            # except ValueError:
+            #     pass
 
         for epoch in range(self.best["epoch"] + 1, self.pytorch_settings.epochs):
             enable_progress = True
@@ -562,12 +643,8 @@ class Trainer:
                 enable_progress=enable_progress,
             )
             if self.optimizer_settings.scheduler is not None:
-                lr_old = self.scheduler.get_last_lr()
                 self.scheduler.step(loss)
-                lr_new = self.scheduler.get_last_lr()
+            self.writer.add_scalar("learning rate", self.optimizer.param_groups[0]["lr"], epoch)
-                if lr_old[0] != lr_new[0]:
-                    self.writer.add_scalar("learning rate", lr_new[0], epoch)
-
             if self.pytorch_settings.save_models and self.model is not None:
                 save_path = (
                     Path(self.pytorch_settings.model_dir) / f"{self.writer.get_logdir().split('/')[-1]}_{epoch}.tar"
@@ -588,7 +665,28 @@ class Trainer:
         self.writer.close()
         return self.best
 
-    def _plot_model_response_eye(self, *signals, labels=None, sps=None, title_append="", subtitle="", show=True):
+    def _plot_model_response_powers(self, powers, layer_names, title_append="", subtitle="", show=True):
+        powers = [power / powers[0] for power in powers]
+        fig, ax = plt.subplots()
+        fig.set_figwidth(18)
+        fig.suptitle(
+            f"Energy conservation{f' {title_append}' if title_append else ''}{f'\n{subtitle}' if subtitle else ''}"
+        )
+        ax.semilogy(powers, marker="o")
+        ax.set_xticks(range(len(layer_names)), layer_names, rotation=90)
+        ax.set_xlabel("Layer")
+        ax.set_ylabel("Normailzed Power")
+        ax.grid(which="major", axis="x")
+        ax.grid(which="major", axis="y")
+        ax.grid(which="minor", axis="y", linestyle=":")
+        fig.tight_layout()
+        if show:
+            plt.show()
+        return fig
+
+    def _plot_model_response_eye(
+        self, *signals, timestamps, labels=None, sps=None, title_append="", subtitle="", show=True
+    ):
         if sps is None:
             raise ValueError("sps must be provided")
         if not hasattr(labels, "__iter__") or isinstance(labels, (str, type(None))):
@@ -603,16 +701,67 @@ class Trainer:
         if not any(labels):
             labels = [f"signal {i + 1}" for i in range(len(signals))]
 
+        x_bins = np.linspace(0, 2, 2 * sps, endpoint=False)
+        y_bins = np.zeros((2 * len(signals), 1000))
+        eye_data = np.zeros((2 * len(signals), 1000, 2 * sps))
+        # signals = [signal.cpu().numpy() for signal in signals]
+        for i in range(len(signals) * 2):
+            eye_signal = signals[i // 2][:, i % 2]  # x, y, x, y, ...
+            eye_signal = np.real(np.square(np.abs(eye_signal)))
+            data_min = np.min(eye_signal)
+            data_max = np.max(eye_signal)
+            y_bins[i] = np.linspace(data_min, data_max, 1000, endpoint=False)
+            for j in range(len(timestamps)):
+                t = timestamps[j] / sps
+                val = eye_signal[j]
+                x = np.digitize(t % 2, x_bins) - 1
+                y = np.digitize(val, y_bins[i]) - 1
+                eye_data[i][y][x] += 1
+
+        cmap = LinearSegmentedColormap.from_list(
+            "eyemap",
+            [
+                (0, "white"),
+                (0.001, "dodgerblue"),
+                (0.1, "blue"),
+                (0.2, "cyan"),
+                (0.5, "lime"),
+                (0.8, "gold"),
+                (1, "red"),
+            ],
+        )
+
+        # ordering = np.argsort(timestamps)
+        # signals = [signal[ordering] for signal in signals]
+        # timestamps = timestamps[ordering]
+
         fig, axs = plt.subplots(1, 2 * len(signals), sharex=True, sharey=True)
         fig.set_figwidth(18)
         fig.suptitle(f"Eye diagram{f' {title_append}' if title_append else ''}{f'\n{subtitle}' if subtitle else ''}")
-        xaxis = np.linspace(0, 2, 2 * sps, endpoint=False)
+        # xaxis = timestamps / sps
-        for j, (label, signal) in enumerate(zip(labels, signals)):
+        # xaxis = np.arange(2 * sps) / sps
+        for j, label in enumerate(labels):
+            x = eye_data[2 * j]
+            y = eye_data[2 * j + 1]
+            # x, y = signal.T
             # signal = signal.cpu().numpy()
-            for i in range(len(signal) // sps - 1):
+            # for i in range(len(signal) // sps - 1):
-                x, y = signal[i * sps : (i + 2) * sps].T
+            # x, y = signal[i * sps : (i + 2) * sps].T
-                axs[0 + 2 * j].plot(xaxis, np.abs(x) ** 2, color=f"C{j}", alpha=1 / (len(signal) // sps) * 10)
+            # axs[0 + 2 * j].scatter((timestamps/sps) % 2, np.abs(x) ** 2, color=f"C{j}", alpha=1 / (len(signal) // sps) * 10, s=1)
-                axs[1 + 2 * j].plot(xaxis, np.abs(y) ** 2, color=f"C{j}", alpha=1 / (len(signal) // sps) * 10)
+            # axs[1 + 2 * j].scatter((timestamps/sps) % 2, np.abs(y) ** 2, color=f"C{j}", alpha=1 / (len(signal) // sps) * 10, s=1)
+            axs[0 + 2 * j].imshow(
+                x, aspect="auto", cmap=cmap, origin="lower", extent=[0, 2, y_bins[2 * j][0], y_bins[2 * j][-1]]
+            )
+            axs[1 + 2 * j].imshow(
+                y, aspect="auto", cmap=cmap, origin="lower", extent=[0, 2, y_bins[2 * j + 1][0], y_bins[2 * j + 1][-1]]
+            )
+            axs[0 + 2 * j].set_xlim((x_bins[0], x_bins[-1]))
+            axs[1 + 2 * j].set_xlim((x_bins[0], x_bins[-1]))
+            ymin = np.min(y_bins[:, 0])
+            ymax = np.max(y_bins[:, -1])
+            ydiff = ymax - ymin
+            axs[0 + 2 * j].set_ylim((ymin - 0.05 * ydiff, ymax + 0.05 * ydiff))
+            axs[1 + 2 * j].set_ylim((ymin - 0.05 * ydiff, ymax + 0.05 * ydiff))
             axs[0 + 2 * j].set_title(label + " x")
             axs[1 + 2 * j].set_title(label + " y")
             axs[0 + 2 * j].set_xlabel("Symbol")
@@ -627,7 +776,9 @@ class Trainer:
             plt.show()
         return fig
 
-    def _plot_model_response_head(self, *signals, labels=None, sps=None, title_append="", subtitle="", show=True):
+    def _plot_model_response_head(
+        self, *signals, timestamps, labels=None, sps=None, title_append="", subtitle="", show=True
+    ):
         if not hasattr(labels, "__iter__") or isinstance(labels, (str, type(None))):
             labels = [labels]
         else:
@@ -640,19 +791,29 @@ class Trainer:
         if not any(labels):
             labels = [f"signal {i + 1}" for i in range(len(signals))]
 
+        ordering = np.argsort(timestamps)
+        signals = [signal[ordering] for signal in signals]
+        timestamps = timestamps[ordering]
+
         fig, axs = plt.subplots(1, 2, sharex=True, sharey=True)
         fig.set_figwidth(18)
         fig.set_figheight(4)
         fig.suptitle(f"Fiber response{f' {title_append}' if title_append else ''}{f'\n{subtitle}' if subtitle else ''}")
         for i, ax in enumerate(axs):
+            ax: plt.Axes
             for signal, label in zip(signals, labels):
                 if sps is not None:
-                    xaxis = np.linspace(0, len(signal) / sps, len(signal), endpoint=False)
+                    xaxis = timestamps / sps
                 else:
-                    xaxis = np.arange(len(signal))
+                    xaxis = timestamps
                 ax.plot(xaxis, np.abs(signal[:, i]) ** 2, label=label)
             ax.set_xlabel("Sample" if sps is None else "Symbol")
             ax.set_ylabel("normalized power")
+            ax.minorticks_on()
+            ax.tick_params(axis="y", which="minor", left=False, right=False)
+            ax.grid(which="major", axis="x")
+            ax.grid(which="minor", axis="x", linestyle=":")
+            ax.grid(which="major", axis="y")
             ax.legend(loc="upper right")
         fig.tight_layout()
         if show:
@@ -664,22 +825,51 @@ class Trainer:
         model=None,
         title_append="",
         subtitle="",
-        mode: Literal["eye", "head"] = "head",
+        mode: Literal["eye", "head", "powers"] = "head",
         show=False,
     ):
+        if mode == "powers":
+            input_data = torch.ones(
+                1, 2 * self.data_settings.output_size, dtype=getattr(torch, self.data_settings.dtype)
+            ).to(self.pytorch_settings.device)
+            model = model.to(self.pytorch_settings.device)
+            model.eval()
+            with torch.no_grad():
+                _, powers = model(input_data, trace_powers=True)
+
+            powers = [power.item() for power in powers]
+            layer_names = ["input", *[str(x).split("(")[0] for x in model._layers._modules.values()]]
+
+            # remove dropout layers
+            mask = [1 if "Dropout" not in layer_name else 0 for layer_name in layer_names]
+            layer_names = [layer_name for layer_name, m in zip(layer_names, mask) if m]
+            powers = [power for power, m in zip(powers, mask) if m]
+
+            fig = self._plot_model_response_powers(
+                powers, layer_names, title_append=title_append, subtitle=subtitle, show=show
+            )
+            return fig
+
         data_settings_backup = copy.deepcopy(self.data_settings)
         pytorch_settings_backup = copy.deepcopy(self.pytorch_settings)
-        self.data_settings.drop_first = 100 * 128
+        self.data_settings.drop_first = 99.5 + random.randint(0, 1000)
         self.data_settings.shuffle = False
         self.data_settings.train_split = 1.0
         self.pytorch_settings.batchsize = (
             self.pytorch_settings.eye_symbols if mode == "eye" else self.pytorch_settings.head_symbols
         )
-        plot_loader, _ = self.get_sliced_data(override={"num_symbols": self.pytorch_settings.batchsize})
+        config_path = random.choice(self.data_settings.config_path)
+        fiber_length = int(float(str(config_path).split('-')[-7])/1000)
+        plot_loader, _ = self.get_sliced_data(
+            override={
+                "num_symbols": self.pytorch_settings.batchsize,
+                "config_path": config_path,
+            }
+        )
         self.data_settings = data_settings_backup
         self.pytorch_settings = pytorch_settings_backup
 
-        fiber_in, fiber_out, regen = self.run_model(model, plot_loader)
+        fiber_in, fiber_out, regen, timestamps = self.run_model(model, plot_loader)
         fiber_in = fiber_in.view(-1, 2)
         fiber_out = fiber_out.view(-1, 2)
         regen = regen.view(-1, 2)
@@ -687,6 +877,7 @@ class Trainer:
         fiber_in = fiber_in.numpy()
         fiber_out = fiber_out.numpy()
         regen = regen.numpy()
+        timestamps = timestamps.numpy()
 
         # https://github.com/matplotlib/matplotlib/issues/27713#issue-2104110987
         # https://github.com/matplotlib/matplotlib/issues/27713#issuecomment-1915497463
@@ -697,9 +888,10 @@ class Trainer:
                 fiber_in,
                 fiber_out,
                 regen,
+                timestamps=timestamps,
                 labels=("fiber in", "fiber out", "regen"),
                 sps=plot_loader.dataset.samples_per_symbol,
-                title_append=title_append,
+                title_append=title_append + f" ({fiber_length} km)",
                 subtitle=subtitle,
                 show=show,
             )
@@ -709,9 +901,10 @@ class Trainer:
                 fiber_in,
                 fiber_out,
                 regen,
+                timestamps=timestamps,
                 labels=("fiber in", "fiber out", "regen"),
                 sps=plot_loader.dataset.samples_per_symbol,
-                title_append=title_append,
+                title_append=title_append + f" ({fiber_length} km)",
                 subtitle=subtitle,
                 show=show,
             )

src/single-core-regen/regen_no_hyper.py

@@ -1,3 +1,6 @@
+import matplotlib
+import numpy as np
+import torch
 from hypertraining.settings import (
     GlobalSettings,
     DataSettings,
@@ -7,16 +10,20 @@ from hypertraining.settings import (
 )
 
 from hypertraining.training import Trainer
-import torch
+
+# import torch
 import json
 import util
 
+from rich import print as rprint
+
 global_settings = GlobalSettings(
-    seed=42,
+    seed=0xC0FFEE,
 )
 
 data_settings = DataSettings(
-    config_path="data/*-128-16384-100000-0-0-17-0-PAM4-0.ini",
+    # config_path="data/*-128-16384-50000-0-0-17-0-PAM4-0.ini",
+    config_path=[f"data/*-128-16384-{length}-0-0-17-0-PAM4-0.ini" for length in (40000, 50000, 60000)],
     dtype="complex64",
     # symbols         = (9, 20), # 13 symbol @ 10GBd <-> 1.3ns <-> 0.26m of fiber
     symbols=13,  # study: single_core_regen_20241123_011232
@@ -45,55 +52,83 @@ model_settings = ModelSettings(
     output_dim=2,
     n_hidden_layers=4,
     overrides={
-        "n_hidden_nodes_0": 8,
+        "n_hidden_nodes_0": 4,
-        "n_hidden_nodes_1": 8,
+        "n_hidden_nodes_1": 4,
         "n_hidden_nodes_2": 4,
-        "n_hidden_nodes_3": 6,
+        "n_hidden_nodes_3": 4,
     },
-    model_activation_func="PowScale",
+    model_activation_func="EOActivation",
-    # dropout_prob=0.01,
+    dropout_prob=0.01,
-    model_layer_function="ONN",
+    model_layer_function="ONNRect",
+    model_layer_kwargs={"square": True},
+    scale=True,
     model_layer_parametrizations=[
         {
             "tensor_name": "weight",
-            "parametrization": torch.nn.utils.parametrizations.orthogonal,
+            "parametrization": util.complexNN.energy_conserving,
+        },
+        {
+            "tensor_name": "alpha",
+            "parametrization": util.complexNN.clamp,
+        },
+        {
+            "tensor_name": "gain",
+            "parametrization": util.complexNN.clamp,
+            "kwargs": {
+                "min": 0,
+                "max": float("inf"),
+            },
+        },
+        {
+            "tensor_name": "phase_bias",
+            "parametrization": util.complexNN.clamp,
+            "kwargs": {
+                "min": 0,
+                "max": 2 * torch.pi,
+            },
         },
         {
             "tensor_name": "scales",
             "parametrization": util.complexNN.clamp,
         },
-        {
+        # {
-            "tensor_name": "scale",
+        #     "tensor_name": "scale",
-            "parametrization": util.complexNN.clamp,
+        #     "parametrization": util.complexNN.clamp,
-        },
+        # },
-        {
+        # {
-            "tensor_name": "bias",
+        #     "tensor_name": "bias",
-            "parametrization": util.complexNN.clamp,
+        #     "parametrization": util.complexNN.clamp,
-        },
+        # },
         # {
         #     "tensor_name": "V",
         #     "parametrization": torch.nn.utils.parametrizations.orthogonal,
         # },
-        # {
+        {
-        #     "tensor_name": "S",
+            "tensor_name": "loss",
-        #     "parametrization": util.complexNN.clamp,
+            "parametrization": util.complexNN.clamp,
-        # },
+        },
     ],
 )
 
 optimizer_settings = OptimizerSettings(
-    optimizer="Adam",
+    optimizer="AdamW",
-    learning_rate=0.05,
+    optimizer_kwargs={
+        "lr": 0.05,
+        "amsgrad": True,
+        # "weight_decay": 1e-7,
+    },
+    # learning_rate=0.05,
     scheduler="ReduceLROnPlateau",
     scheduler_kwargs={
         "patience": 2**6,
-        "factor": 0.9, 
+        "factor": 0.75,
         # "threshold": 1e-3,
         "min_lr": 1e-6,
         "cooldown": 10,
     },
 )
 
+
 def save_dict_to_file(dictionary, filename):
     """
     Save the best dictionary to a JSON file.
@@ -103,28 +138,79 @@ def save_dict_to_file(dictionary, filename):
     :param filename: Path to the JSON file where the dictionary will be saved.
     :type filename: str
     """
-    with open(filename, 'w') as f:
+    with open(filename, "w") as f:
         json.dump(dictionary, f, indent=4)
 
 
+def sweep_lengths(*lengths, model=None):
+    assert model is not None, "Model must be provided."
+    model = model
+
+    fiber_ins = {}
+    fiber_outs = {}
+    regens = {}
+    timestampss = {}
+
+    for length in lengths:
+        trainer = Trainer(
+            checkpoint_path=model,
+            settings_override={
+                "data_settings": {
+                    "config_path": f"data/*-128-16384-{length}-0-0-17-0-PAM4-0.ini",
+                    "train_split": 1,
+                    "shuffle": True,
+                }
+            },
+        )
+        trainer.define_model()
+        loader, _ = trainer.get_sliced_data()
+        fiber_in, fiber_out, regen, timestamps = trainer.run_model(trainer.model, loader=loader)
+
+        fiber_ins[length] = fiber_in
+        fiber_outs[length] = fiber_out
+        regens[length] = regen
+        timestampss[length] = timestamps
+
+    data = torch.zeros(2 * len(lengths), 2, fiber_out.shape[0])
+    channel_names = ["" for _ in range(2 * len(lengths))]
+
+    for li, length in enumerate(lengths):
+        data[2 * li, 0, :] = timestampss[length] / 128
+        data[2 * li, 1, :] = regens[length][:, 0].abs().square()
+        data[2 * li + 1, 0, :] = timestampss[length] / 128
+        data[2 * li + 1, 1, :] = regens[length][:, 1].abs().square()
+
+        channel_names[2 * li] = f"regen x {length}"
+        channel_names[2 * li + 1] = f"regen y {length}"
+
+    # get current backend
+    backend = matplotlib.get_backend()
+
+    matplotlib.use("TkCairo")
+    eye = util.eye_diagram.eye_diagram(data.to(dtype=torch.float32).detach().cpu().numpy(), channel_names=channel_names)
+
+    print_attrs = ("channel", "success", "min_area")
+    with np.printoptions(precision=3, suppress=True, formatter={'float': '{:0.3e}'.format}):
+        for result in eye.eye_stats:
+            print_dict = {attr: result[attr] for attr in print_attrs}
+            rprint(print_dict)
+            rprint()
+
+    eye.plot()
+    matplotlib.use(backend)
+
+
 if __name__ == "__main__":
+
+    # sweep_lengths(30000, 40000, 50000, 60000, 70000, model=".models/best_20241202_143149.tar")
+
     trainer = Trainer(
         global_settings=global_settings,
         data_settings=data_settings,
         pytorch_settings=pytorch_settings,
         model_settings=model_settings,
         optimizer_settings=optimizer_settings,
-        checkpoint_path='.models/20241128_084935_8885.tar',
+        # checkpoint_path=".models/best_20241202_143149.tar",
-        settings_override={
+        # 20241202_143149
-            "model_settings": {
-                # "model_activation_func": "PowScale",
-                "dropout_prob": 0,
-            }
-        },
-        reset_epoch=True,
     )
-
+    trainer.train()
-    best = trainer.train()
-    save_dict_to_file(best, ".models/best_results.json")
-
-    ...

src/single-core-regen/sliced_dataset_test.py

@@ -0,0 +1,88 @@
+# move into dir single-core-regen before running
+
+from util.datasets import FiberRegenerationDataset
+from torch.utils.data import DataLoader
+from matplotlib import pyplot as plt
+import numpy as np
+
+# def eye_dataset(dataset, no_symbols=None, offset=False, show=True):
+#     if no_symbols is None:
+#         no_symbols = len(dataset)
+#     _, axs = plt.subplots(2,2, sharex=True, sharey=True)
+
+#     xaxis = np.linspace(0,dataset.symbols_per_slice,dataset.samples_per_slice)
+#     roll = dataset.samples_per_symbol//2 if offset else 0
+#     for E_out, E_in in dataset[roll:dataset.samples_per_symbol*no_symbols+roll:dataset.samples_per_symbol]:
+#         E_in_x, E_in_y, E_out_x, E_out_y = E_in[0], E_in[1], E_out[0], E_out[1]
+#         axs[0,0].plot(xaxis, np.abs( E_in_x.numpy())**2, alpha=0.05, color='C0')
+#         axs[1,0].plot(xaxis, np.abs( E_in_y.numpy())**2, alpha=0.05, color='C0')
+#         axs[0,1].plot(xaxis, np.abs(E_out_x.numpy())**2, alpha=0.05, color='C0')
+#         axs[1,1].plot(xaxis, np.abs(E_out_y.numpy())**2, alpha=0.05, color='C0')
+
+#     if show:
+#         plt.show()
+
+# # def plt_dataloader(dataloader, show=True):
+# #     _, axs = plt.subplots(2,2, sharex=True, sharey=True)
+
+# #     E_outs, E_ins = next(iter(dataloader))
+# #     for i, (E_out, E_in) in enumerate(zip(E_outs, E_ins)):
+# #         xaxis = np.linspace(dataset.symbols_per_slice*i,dataset.symbols_per_slice+dataset.symbols_per_slice*i,dataset.samples_per_slice)
+# #         E_in_x, E_in_y, E_out_x, E_out_y = E_in[0], E_in[1], E_out[0], E_out[1]
+# #         axs[0,0].plot(xaxis, np.abs(E_in_x.numpy())**2)
+# #         axs[1,0].plot(xaxis, np.abs(E_in_y.numpy())**2)
+# #         axs[0,1].plot(xaxis, np.abs(E_out_x.numpy())**2)
+# #         axs[1,1].plot(xaxis, np.abs(E_out_y.numpy())**2)
+
+# #     if show:
+# #         plt.show()
+
+if __name__ == "__main__":
+
+    dataset = FiberRegenerationDataset("data/20241115-175517-128-16384-10000-0-0-17-0-PAM4-0.ini", symbols=13, drop_first=100, output_dim=26, num_symbols=100)
+
+    loader = DataLoader(dataset, batch_size=10, shuffle=True)
+    
+    x = []
+    y_fiber_in = []
+    y_fiber_out = []
+
+    for i, batch in enumerate(loader):
+        # if i > 128:
+        #     break
+        
+        fiber_in, fiber_out, timestamp = batch
+
+        fiber_out = fiber_out.reshape(fiber_out.shape[0], -1, 2)
+        fiber_out = fiber_out[:,fiber_out.shape[1]//2, :]
+
+        # input_data = input_data.reshape(-1,2)
+        # target = target.reshape(-1,2).squeeze()
+        # timestamp = timestamp.reshape(-1,1).squeeze()
+
+        x.append(timestamp.detach().numpy())
+        y_fiber_in.append(fiber_in.abs().square().detach().numpy())
+        y_fiber_out.append(fiber_out.abs().square().detach().numpy())
+
+    x = np.concat(x)
+    y_fiber_in = np.concat(y_fiber_in)
+    y_fiber_out = np.concat(y_fiber_out)
+
+    # order = np.argsort(x)
+    # x = x[order]
+    # y = y[order]
+
+    fig, axs = plt.subplots(2,2, sharex=True, sharey=True)
+    axs[0,0].scatter((x/dataset.samples_per_symbol)%2, y_fiber_in[:,0], s=1, alpha=0.1)
+    axs[1,0].scatter((x/dataset.samples_per_symbol)%2, y_fiber_in[:,1], s=1, alpha=0.1)
+    axs[0,1].scatter((x/dataset.samples_per_symbol)%2, y_fiber_out[:,0], s=1, alpha=0.1)
+    axs[1,1].scatter((x/dataset.samples_per_symbol)%2, y_fiber_out[:,1], s=1, alpha=0.1)
+    plt.show()
+
+    # eye_dataset(dataset, 1000, offset=True, show=False)
+
+    # train_loader = DataLoader(dataset, batch_size=10, shuffle=False)
+
+    # plt_dataloader(train_loader, show=False)
+
+    # plt.show()

src/single-core-regen/testing/sliced_dataset_test.py

@@ -1,51 +0,0 @@
-# move into dir single-core-regen before running
-
-from util.dataset import SlicedDataset
-from torch.utils.data import DataLoader
-from matplotlib import pyplot as plt
-import numpy as np
-
-def eye_dataset(dataset, no_symbols=None, offset=False, show=True):
-    if no_symbols is None:
-        no_symbols = len(dataset)
-    _, axs = plt.subplots(2,2, sharex=True, sharey=True)
-
-    xaxis = np.linspace(0,dataset.symbols_per_slice,dataset.samples_per_slice)
-    roll = dataset.samples_per_symbol//2 if offset else 0
-    for E_out, E_in in dataset[roll:dataset.samples_per_symbol*no_symbols+roll:dataset.samples_per_symbol]:
-        E_in_x, E_in_y, E_out_x, E_out_y = E_in[0], E_in[1], E_out[0], E_out[1]
-        axs[0,0].plot(xaxis, np.abs( E_in_x.numpy())**2, alpha=0.05, color='C0')
-        axs[1,0].plot(xaxis, np.abs( E_in_y.numpy())**2, alpha=0.05, color='C0')
-        axs[0,1].plot(xaxis, np.abs(E_out_x.numpy())**2, alpha=0.05, color='C0')
-        axs[1,1].plot(xaxis, np.abs(E_out_y.numpy())**2, alpha=0.05, color='C0')
-
-    if show:
-        plt.show()
-
-# def plt_dataloader(dataloader, show=True):
-#     _, axs = plt.subplots(2,2, sharex=True, sharey=True)
-
-#     E_outs, E_ins = next(iter(dataloader))
-#     for i, (E_out, E_in) in enumerate(zip(E_outs, E_ins)):
-#         xaxis = np.linspace(dataset.symbols_per_slice*i,dataset.symbols_per_slice+dataset.symbols_per_slice*i,dataset.samples_per_slice)
-#         E_in_x, E_in_y, E_out_x, E_out_y = E_in[0], E_in[1], E_out[0], E_out[1]
-#         axs[0,0].plot(xaxis, np.abs(E_in_x.numpy())**2)
-#         axs[1,0].plot(xaxis, np.abs(E_in_y.numpy())**2)
-#         axs[0,1].plot(xaxis, np.abs(E_out_x.numpy())**2)
-#         axs[1,1].plot(xaxis, np.abs(E_out_y.numpy())**2)
-
-#     if show:
-#         plt.show()
-
-if __name__ == "__main__":
-
-    dataset = SlicedDataset("data/20241115-175517-128-16384-10000-0-0-17-0-PAM4-0.ini", symbols=1, drop_first=100)
-    print(dataset[0][0].shape)
-
-    eye_dataset(dataset, 1000, offset=True, show=False)
-
-    train_loader = DataLoader(dataset, batch_size=10, shuffle=False)
-
-    # plt_dataloader(train_loader, show=False)
-
-    plt.show()

src/single-core-regen/util/__init__.py

@@ -17,3 +17,5 @@ from . import complexNN # noqa: F401
 # from .complexNN import complex_sse_loss  # noqa: F401
 
 from . import misc # noqa: F401
+
+from . import eye_diagram # noqa: F401

src/single-core-regen/util/complexNN.py

@@ -4,23 +4,36 @@ import torch.nn.functional as F
 # from torchlambertw.special import lambertw
 
 
-def complex_mse_loss(input, target, power=False, reduction="mean"):
+def complex_mse_loss(input, target, power=False, normalize=False, reduction="mean"):
     """
     Compute the mean squared error between two complex tensors.
     If power is set to True, the loss is computed as |input|^2 - |target|^2
     """
     reduce = getattr(torch, reduction)
+    power_penalty = 0
 
     if power:
         input = (input * input.conj()).real.to(dtype=input.dtype.to_real())
         target = (target * target.conj()).real.to(dtype=target.dtype.to_real())
+        if normalize:
+            power_penalty = ((input.max() - input.min()) - (target.max() - target.min())) ** 2
+            power_penalty += (input.min() - target.min()) ** 2
+            input = input - input.min()
+            input = input / input.max()
+            target = target - target.min()
+            target = target / target.max()
+    else:
+        if normalize:
+            power_penalty = (input.abs().max() - target.abs().max()) ** 2
+            input = input / input.abs().max()
+            target = target / target.abs().max()
 
     if input.is_complex() and target.is_complex():
-        return reduce(torch.square(input.real - target.real) + torch.square(input.imag - target.imag))
+        return reduce(torch.square(input.real - target.real) + torch.square(input.imag - target.imag)) + power_penalty
     elif input.is_complex() or target.is_complex():
         raise ValueError("Input and target must have the same type (real or complex)")
     else:
-        return F.mse_loss(input, target, reduction=reduction)
+        return F.mse_loss(input, target, reduction=reduction) + power_penalty
 
 
 def complex_sse_loss(input, target):
@@ -53,14 +66,10 @@ class UnitaryLayer(nn.Module):
         return f"UnitaryLayer({self.in_features}, {self.out_features})"
 
 
-
 class _Unitary(nn.Module):
     def forward(self, X: torch.Tensor):
         if X.ndim < 2:
-            raise ValueError(
+            raise ValueError(f"Only tensors with 2 or more dimensions are supported. Got a tensor of shape {X.shape}")
-                "Only tensors with 2 or more dimensions are supported. "
-                f"Got a tensor of shape {X.shape}"
-            )
         n, k = X.size(-2), X.size(-1)
         transpose = n < k
         if transpose:
@@ -80,6 +89,7 @@ class _Unitary(nn.Module):
         # X.copy_(q)
         return q
 
+
 def unitary(module: nn.Module, name: str = "weight") -> nn.Module:
     weight = getattr(module, name, None)
     if not isinstance(weight, torch.Tensor):
@@ -95,6 +105,7 @@ def unitary(module: nn.Module, name: str = "weight") -> nn.Module:
     nn.utils.parametrize.register_parametrization(module, name, unit)
     return module
 
+
 class _SpecialUnitary(nn.Module):
     def __init__(self):
         super().__init__()
@@ -108,6 +119,7 @@ class _SpecialUnitary(nn.Module):
 
         return q
 
+
 def special_unitary(module: nn.Module, name: str = "weight") -> nn.Module:
     weight = getattr(module, name, None)
     if not isinstance(weight, torch.Tensor):
@@ -123,11 +135,13 @@ def special_unitary(module: nn.Module, name: str = "weight") -> nn.Module:
     nn.utils.parametrize.register_parametrization(module, name, unit)
     return module
 
+
 class _Clamp(nn.Module):
     def __init__(self, min, max):
         super(_Clamp, self).__init__()
         self.min = min
         self.max = max
+
     def forward(self, x):
         if x.is_complex():
             # clamp magnitude, ignore phase
@@ -145,43 +159,29 @@ def clamp(module: nn.Module, name: str = "scale", min=0, max=1) -> nn.Module:
     return module
 
 
-class ONNMiller(nn.Module):
+class _EnergyConserving(nn.Module):
-    def __init__(self, input_dim, output_dim, dtype=None) -> None:
+    def __init__(self):
-        super(ONNMiller, self).__init__()
+        super(_EnergyConserving, self).__init__()
-        self.input_dim = input_dim
-        self.output_dim = output_dim
-        self.dtype = dtype
 
-        self.dim = max(input_dim, output_dim)
+    def forward(self, X: torch.Tensor):
+        if X.ndim == 2:
+            X = X.unsqueeze(0)
+        spectral_norm = torch.linalg.svdvals(X)[:, 0]
+        return (X / spectral_norm).squeeze()
 
-        # zero pad input to internal size if smaller
-        if self.input_dim < self.dim:
-            self.pad = lambda x: F.pad(x, ((self.dim - self.input_dim) // 2, (self.dim - self.input_dim + 1) // 2))
-        else:
-            self.pad = lambda x: x
-        self.pad.__doc__ = f"Zero pad input from {self.input_dim} to {self.dim}"
 
-        # crop output to desired size
+def energy_conserving(module: nn.Module, name: str = "weight") -> nn.Module:
-        if self.output_dim < self.dim:
+    param = getattr(module, name, None)
-            self.crop = lambda x: x[:, (self.dim - self.output_dim) // 2 : (x.shape[1] - (self.dim - self.output_dim + 1) // 2)]
+    if not isinstance(param, torch.Tensor):
-        else:
+        raise ValueError(f"Module '{module}' has no parameter or buffer '{name}'")
-            self.crop = lambda x: x
-        self.crop.__doc__ = f"Crop output from {self.dim} to {self.output_dim}"
 
-        self.U = nn.Parameter(torch.randn(self.dim, self.dim, dtype=self.dtype))     # -> parametrization: Unitary
+    if not (2 <= param.ndim <= 3):
-        self.S = nn.Parameter(torch.randn(self.dim, dtype=self.dtype))               # -> parametrization: Clamp (magnitude 0..1)
+        raise ValueError(f"Expected a matrix or batch of matrices. Got a tensor of {param.ndim} dimensions.")
-        self.V = nn.Parameter(torch.randn(self.dim, self.dim, dtype=self.dtype))     # -> parametrization: Unitary
+
-        self.register_buffer("MZI_scale", torch.tensor(2, dtype=self.dtype.to_real()).sqrt())
+    unit = _EnergyConserving()
-        # V is actually V.H, but 
+    nn.utils.parametrize.register_parametrization(module, name, unit)
+    return module
 
-    def forward(self, x_in):
-        x = x_in
-        x = self.pad(x)
-        x = x @ self.U
-        x = x * (self.S.squeeze() / self.MZI_scale)
-        x = x @ self.V
-        x = self.crop(x)
-        return x
 
 class ONN(nn.Module):
     def __init__(self, input_dim, output_dim, dtype=None) -> None:
@@ -202,18 +202,21 @@ class ONN(nn.Module):
 
         # crop output to desired size
         if self.output_dim < self.dim:
-            self.crop = lambda x: x[:, (self.dim - self.output_dim) // 2 : (x.shape[1] - (self.dim - self.output_dim + 1) // 2)]
+            self.crop = lambda x: x[
+                :, (self.dim - self.output_dim) // 2 : (x.shape[1] - (self.dim - self.output_dim + 1) // 2)
+            ]
             self.crop.__doc__ = f"Crop output from {self.dim} to {self.output_dim}"
         else:
             self.crop = lambda x: x
             self.crop.__doc__ = f"Output size equals internal size {self.dim}"
 
-
         self.weight = nn.Parameter(torch.randn(self.dim, self.dim, dtype=self.dtype))
+        # self.scale = nn.Parameter(torch.randn(1, dtype=self.dtype.to_real())+0.5)
 
     def reset_parameters(self):
         q, _ = torch.linalg.qr(self.weight)
         self.weight.data = q
+
     # def get_M(self):
     # return self.U @ self.sigma @ self.V
 
@@ -221,37 +224,50 @@ class ONN(nn.Module):
         return self.crop(self.pad(x) @ self.weight)
 
 
-class SemiUnitaryLayer(nn.Module):
+class ONNRect(nn.Module):
-    def __init__(self, input_dim, output_dim, dtype=None):
+    def __init__(self, input_dim, output_dim, square=False, dtype=None):
-        super(SemiUnitaryLayer, self).__init__()
+        super(ONNRect, self).__init__()
         self.input_dim = input_dim
         self.output_dim = output_dim
 
-        # Create a larger square matrix for QR decomposition
+        if square:
-        self.weight = nn.Parameter(torch.randn(max(input_dim, output_dim), max(input_dim, output_dim), dtype=dtype))
+            dim = max(input_dim, output_dim)
-        self.scale = nn.Parameter(torch.tensor(1.0, dtype=dtype.to_real()))
+            self.weight = nn.Parameter(torch.randn(dim, dim, dtype=dtype))
-        self.reset_parameters()
             
-    def reset_parameters(self):
+            # zero pad input to internal size if smaller
-        # Ensure the weights are unitary by QR decomposition
+            if self.input_dim < dim:
-        q, _ = torch.linalg.qr(self.weight)
+                self.pad = lambda x: F.pad(x, ((dim - self.input_dim) // 2, (dim - self.input_dim + 1) // 2))
-        # A = QR with A being a complex square matrix -> Q is unitary, R is upper triangular
+                self.pad.__doc__ = f"Zero pad input from {self.input_dim} to {dim}"
-
-        # truncate the matrix to the desired size
-        if self.input_dim > self.output_dim:
-            self.weight.data = q[: self.input_dim, : self.output_dim]
             else:
-            self.weight.data = q[: self.output_dim, : self.input_dim].t()
+                self.pad = lambda x: x
-        ...
+                self.pad.__doc__ = f"Input size equals internal size {dim}"
+
+            # crop output to desired size
+            if self.output_dim < dim:
+                self.crop = lambda x: x[
+                    :, (dim - self.output_dim) // 2 : (x.shape[1] - (dim - self.output_dim + 1) // 2)
+                ]
+                self.crop.__doc__ = f"Crop output from {dim} to {self.output_dim}"
+            else:
+                self.crop = lambda x: x
+                self.crop.__doc__ = f"Output size equals internal size {dim}"
+
+
+        else:
+            self.weight = nn.Parameter(torch.randn(output_dim, input_dim, dtype=dtype))
+            self.pad = lambda x: x
+            self.pad.__doc__ = "No padding"
+            self.crop = lambda x: x
+            self.crop.__doc__ = "No cropping"
+
 
     def forward(self, x):
-        with torch.no_grad():
+        x = self.pad(x)
-            scale = torch.clamp(self.scale, 0.0, 1.0)
+        out = self.crop((self.weight @ x.mT).mT)
-        out = torch.matmul(x, scale * self.weight)
         return out
 
-    def __repr__(self):
+    # def __repr__(self):
-        return f"SemiUnitaryLayer({self.input_dim}, {self.output_dim})"
+    #     return f"ONNRect({self.input_dim}, {self.output_dim})"
 
 
 # class SaturableAbsorberLambertW(nn.Module):
@@ -336,6 +352,19 @@ class DropoutComplex(nn.Module):
             return self.dropout(x)
 
 
+class Scale(nn.Module):
+    def __init__(self, size):
+        super(Scale, self).__init__()
+        self.size = size
+        self.scale = nn.Parameter(torch.ones(size, dtype=torch.float32))
+
+    def forward(self, x):
+        return x * self.scale
+
+    def __repr__(self):
+        return f"Scale({self.size})"
+
+
 class Identity(nn.Module):
     """
     implements the "activation" function
@@ -348,6 +377,7 @@ class Identity(nn.Module):
     def forward(self, x):
         return x
 
+
 class PowRot(nn.Module):
     def __init__(self, bias=False):
         super(PowRot, self).__init__()
@@ -363,11 +393,71 @@ class PowRot(nn.Module):
         else:
             return x
 
+
+class MZISingle(nn.Module):
+    def __init__(self, bias, size, func=None):
+        super(MZISingle, self).__init__()
+        self.omega = nn.Parameter(torch.randn(size))
+        self.phi = nn.Parameter(torch.randn(size))
+        self.func = func or (lambda x: x.abs().square())  # default to |z|^2
+
+    def forward(self, x: torch.Tensor):
+        return x * torch.exp(1j * self.phi) * torch.sin(self.omega + self.func(x))
+
+
+class EOActivation(nn.Module):
+    def __init__(self, bias, size=None):
+        # 10.1109/SiPhotonics60897.2024.10543376
+        super(EOActivation, self).__init__()
+        if size is None:
+            raise ValueError("Size must be specified")
+        self.size = size
+        self.alpha = nn.Parameter(torch.ones(size))
+        self.V_bias = nn.Parameter(torch.ones(size))
+        self.gain = nn.Parameter(torch.ones(size))
+        # if bias:
+        #     self.phase_bias = nn.Parameter(torch.zeros(size))
+        # else:
+        # self.register_buffer("phase_bias", torch.zeros(size))
+        self.register_buffer("phase_bias", torch.clamp(torch.ones(size) + torch.randn(size)*0.1, 0, 1)*torch.pi)
+        self.register_buffer("responsivity", torch.ones(size)*0.9)
+        self.register_buffer("V_pi", torch.ones(size)*3)
+
+        self.reset_weights()
+    
+    def reset_weights(self):
+        if "alpha" in self._parameters:
+            self.alpha.data = torch.ones(self.size)*0.5
+        if "V_pi" in self._parameters:
+            self.V_pi.data = torch.ones(self.size)*3
+        if "V_bias" in self._parameters:
+            self.V_bias.data = torch.zeros(self.size)
+        if "gain" in self._parameters:
+            self.gain.data = torch.ones(self.size)
+        if "responsivity" in self._parameters:
+            self.responsivity.data = torch.ones(self.size)*0.9
+        if "bias" in self._parameters:
+            self.phase_bias.data = torch.zeros(self.size)
+
+    def forward(self, x: torch.Tensor):
+        phi_b = torch.pi * self.V_bias / (self.V_pi + 1e-8)
+        g_phi = torch.pi * (self.alpha * self.gain * self.responsivity) / (self.V_pi + 1e-8)
+        intermediate = g_phi * x.abs().square() + phi_b
+        return (
+            1j
+            * torch.sqrt(1 - self.alpha)
+            * torch.exp(-0.5j * (intermediate + self.phase_bias))
+            * torch.cos(0.5 * intermediate)
+            * x
+        )
+
+
 class Pow(nn.Module):
     """
     implements the activation function
     M(z) = ||z||^2 + b
     """
+
     def __init__(self, bias=False):
         super(Pow, self).__init__()
         if bias:
@@ -375,7 +465,6 @@ class Pow(nn.Module):
         else:
             self.register_buffer("bias", torch.tensor(0.0))
 
-
     def forward(self, x: torch.Tensor):
         return x.abs().square().add(self.bias).to(dtype=x.dtype)
 
@@ -408,6 +497,7 @@ class MagScale(nn.Module):
     def forward(self, x: torch.Tensor):
         return x.abs().add(self.bias).to(dtype=x.dtype).sin().mul(x)
 
+
 class PowScale(nn.Module):
     def __init__(self, bias=False):
         super(PowScale, self).__init__()
@@ -486,10 +576,10 @@ __all__ = [
     complex_mse_loss,
     UnitaryLayer,
     unitary,
+    energy_conserving,
     clamp,
     ONN,
-    ONNMiller,
+    ONNRect,
-    SemiUnitaryLayer,
     DropoutComplex,
     Identity,
     Pow,
@@ -498,6 +588,8 @@ __all__ = [
     ModReLU,
     CReLU,
     ZReLU,
+    MZISingle,
+    EOActivation,
     # SaturableAbsorberLambertW,
     # SaturableAbsorber,
     # SpreadLayer,

src/single-core-regen/util/datasets.py

@@ -40,7 +40,8 @@ def load_data(config_path, skipfirst=0, symbols=None, real=False, normalize=Fals
     if symbols is None:
         symbols = int(config["glova"]["nos"]) - skipfirst
 
-    data = np.load(datapath)[skipfirst * sps : symbols * sps + skipfirst * sps]
+    data = np.load(datapath)[int(skipfirst * sps) : int(symbols * sps + skipfirst * sps)]
+    timestamps = np.arange(int(skipfirst * sps), int(symbols * sps + skipfirst * sps))
 
     if normalize:
         # square gets normalized to 1, as the power is (proportional to) the square of the amplitude
@@ -53,6 +54,8 @@ def load_data(config_path, skipfirst=0, symbols=None, real=False, normalize=Fals
 
     config["glova"]["nos"] = str(symbols)
 
+    data = np.concatenate([data, timestamps.reshape(-1,1)], axis=-1)
+
     data = torch.tensor(data, device=device, dtype=dtype)
 
     return data, config
@@ -100,7 +103,7 @@ class FiberRegenerationDataset(Dataset):
 
     def __init__(
         self,
-        file_path: str | Path,
+        file_path: tuple | list | str | Path,
         symbols: int | float,
         *,
         output_dim: int = None,
@@ -130,12 +133,12 @@ class FiberRegenerationDataset(Dataset):
         """
 
         # check types
-        assert isinstance(file_path, str), "file_path must be a string"
+        assert isinstance(file_path, (str, Path, tuple, list)), "file_path must be a string, Path, tuple, or list"
         assert isinstance(symbols, (float, int)), "symbols must be a float or an integer"
         assert output_dim is None or isinstance(output_dim, int), "output_len must be an integer"
         assert isinstance(target_delay, (float, int)), "target_delay must be a float or an integer"
         assert isinstance(xy_delay, (float, int)), "xy_delay must be a float or an integer"
-        assert isinstance(drop_first, int), "drop_first must be an integer"
+        # assert isinstance(drop_first, int), "drop_first must be an integer"
 
         # check values
         assert symbols > 0, "symbols must be positive"
@@ -150,20 +153,38 @@ class FiberRegenerationDataset(Dataset):
                 dtype=np.complex128,
             )
             data_raw = torch.tensor(data_raw, device=device, dtype=dtype)
+            timestamps = torch.arange(12800)
+
+            data_raw = torch.concatenate([data_raw, timestamps.reshape(-1, 1)], axis=-1)
+
             self.config = {
                 "data": {"dir": '"."', "npy_dir": '"."', "file": "faux"},
                 "glova": {"sps": 128},
             }
         else:
-            data_raw, self.config = load_data(
+            data_raw = None
+            self.config = None
+            files = []
+            for file_path in (file_path if isinstance(file_path, (tuple, list)) else [file_path]):
+                data, config = load_data(
                     file_path,
                     skipfirst=drop_first,
-                symbols=kwargs.pop("num_symbols", None),
+                    symbols=kwargs.get("num_symbols", None),
                     real=real,
                     normalize=True,
                     device=device,
                     dtype=dtype,
                 )
+                if data_raw is None:
+                    data_raw = data
+                else:
+                    data_raw = torch.cat([data_raw, data], dim=0)
+                if self.config is None:
+                    self.config = config
+                else:
+                    assert self.config["glova"]["sps"] == config["glova"]["sps"], "samples per symbol must be the same"
+                files.append(config["data"]["file"].strip('"'))
+            self.config["data"]["file"] = str(files)
             
         self.device = data_raw.device
 
@@ -190,10 +211,10 @@ class FiberRegenerationDataset(Dataset):
         # data_raw = torch.tensor(data_raw, dtype=dtype)
 
         # data layout
-        # [ [E_in_x0, E_in_y0, E_out_x0, E_out_y0],
+        # [ [E_in_x0, E_in_y0, E_out_x0, E_out_y0, timestamp0],
-        #   [E_in_x1, E_in_y1, E_out_x1, E_out_y1],
+        #   [E_in_x1, E_in_y1, E_out_x1, E_out_y1, timestamp1],
         #        ...
-        #   [E_in_xN, E_in_yN, E_out_xN, E_out_yN] ]
+        #   [E_in_xN, E_in_yN, E_out_xN, E_out_yN, timestampN] ]
 
         data_raw = data_raw.transpose(0, 1)
 
@@ -201,16 +222,18 @@ class FiberRegenerationDataset(Dataset):
         # [     E_in_x[0:N],
         #       E_in_y[0:N],
         #      E_out_x[0:N],
-        #   E_out_y[0:N] ]
+        #      E_out_y[0:N],
+        #   timestamps[0:N] ]
 
         # shift x data by xy_delay_samples relative to the y data (example value: 3)
         # [ E_in_x [0:N],         [ E_in_x [ 0:N  ],        [ E_in_x [3:N  ],
         #   E_in_y [0:N],    ->     E_in_y [-3:N-3],    ->    E_in_y [0:N-3],
         #   E_out_x[0:N],           E_out_x[ 0:N  ],          E_out_x[3:N  ],
-        #   E_out_y[0:N] ]          E_out_y[-3:N-3] ]         E_out_y[0:N-3] ]
+        #   E_out_y[0:N] ]          E_out_y[-3:N-3] ]         E_out_y[0:N-3],
+        #   timestamps[0:N] ]       timestamps[ 0:N  ] ]      timestamps[3:N  ] ]
 
         if self.xy_delay_samples != 0:
-            data_raw = roll_along(data_raw, [0, self.xy_delay_samples, 0, self.xy_delay_samples], dim=1)
+            data_raw = roll_along(data_raw, [0, self.xy_delay_samples, 0, self.xy_delay_samples, 0], dim=1)
         if self.xy_delay_samples > 0:
             data_raw = data_raw[:, self.xy_delay_samples :]
         elif self.xy_delay_samples < 0:
@@ -221,12 +244,13 @@ class FiberRegenerationDataset(Dataset):
         # [ E_in_x [0:N],         [ E_in_x [-5:N-5],        [ E_in_x [0:N-5],
         #   E_in_y [0:N],    ->     E_in_y [-5:N-5],    ->    E_in_y [0:N-5],
         #   E_out_x[0:N],           E_out_x[ 0:N  ],          E_out_x[5:N  ],
-        #   E_out_y[0:N] ]          E_out_y[ 0:N  ] ]         E_out_y[5:N  ] ]
+        #   E_out_y[0:N] ]          E_out_y[ 0:N  ] ]         E_out_y[5:N  ],
+        #  timestamps[0:N] ]       timestamps[ 0:N  ] ]      timestamps[5:N  ]
 
         if self.target_delay_samples != 0:
             data_raw = roll_along(
                 data_raw,
-                [self.target_delay_samples, self.target_delay_samples, 0, 0],
+                [self.target_delay_samples, self.target_delay_samples, 0, 0, 0],
                 dim=1,
             )
         if self.target_delay_samples > 0:
@@ -234,21 +258,25 @@ class FiberRegenerationDataset(Dataset):
         elif self.target_delay_samples < 0:
             data_raw = data_raw[:, : self.target_delay_samples]
 
+        timestamps = data_raw[-1, :]
+        data_raw = data_raw[:-1, :]
         data_raw = data_raw.view(2, 2, -1)
+        timestamps_doubled = torch.cat([timestamps.unsqueeze(dim=0), timestamps.unsqueeze(dim=0)], dim=0).unsqueeze(dim=1)
+        data_raw = torch.cat([data_raw, timestamps_doubled], dim=1)
         # data layout
-        # [ [E_in_x,  E_in_y],
+        # [ [E_in_x,  E_in_y, timestamps],
-        #   [E_out_x, E_out_y] ]
+        #   [E_out_x, E_out_y, timestamps] ]
 
         self.data = data_raw.unfold(dimension=-1, size=self.samples_per_slice, step=1)
         self.data = self.data.movedim(-2, 0)
-        # -> [no_slices, 2, 2, samples_per_slice]
+        # -> [no_slices, 2, 3, samples_per_slice]
 
         # data layout
         # [
-        #   [ [E_in_x[0:N+0], E_in_y[0:N+0] ], [ E_out_x[0:N+0], E_out_y[0:N+0] ] ],
+        #   [ [E_in_x[0:N+0], E_in_y[0:N+0], timestamps[0:N+0]], [ E_out_x[0:N+0], E_out_y[0:N+0], timestamps[0:N+0] ] ],
-        #   [ [E_in_x[1:N+1], E_in_y[1:N+1] ], [ E_out_x[1:N+1], E_out_y[1:N+1] ] ],
+        #   [ [E_in_x[1:N+1], E_in_y[1:N+1], timestamps[1:N+1]], [ E_out_x[1:N+1], E_out_y[1:N+1], timestamps[1:N+1] ] ],
         #   ...
-        # ] -> [no_slices, 2, 2, samples_per_slice]
+        # ] -> [no_slices, 2, 3, samples_per_slice]
 
         ...
 
@@ -259,24 +287,24 @@ class FiberRegenerationDataset(Dataset):
         if isinstance(idx, slice):
             return [self.__getitem__(i) for i in range(*idx.indices(len(self)))]
         else:
-            data, target = self.data[idx, 1].squeeze(), self.data[idx, 0].squeeze()
+            data_slice = self.data[idx].squeeze()
 
-            # reduce by by taking self.output_dim equally spaced samples
+            data_slice = data_slice[:, :, :data_slice.shape[2] // self.output_dim * self.output_dim]
-            data = data[:, : data.shape[1] // self.output_dim * self.output_dim]
+
-            data = data.view(data.shape[0], self.output_dim, -1)
+            data_slice = data_slice.view(data_slice.shape[0], data_slice.shape[1], self.output_dim, -1)
-            data = data[:, :, 0]
+
+            target = data_slice[0, :, self.output_dim//2, 0]
+            data = data_slice[1, :, :, 0]
+
+            # data_timestamps = data[-1,:].real
+            data = data[:-1, :]
+            target_timestamp = target[-1].real
+            target = target[:-1]
 
-            # target is corresponding to the middle of the data as the output sample is influenced by the data before and after it
-            target = target[:, : target.shape[1] // self.output_dim * self.output_dim]
-            target = target.view(target.shape[0], self.output_dim, -1)
-            target = target[:, 0, target.shape[2] // 2]
 
             data = data.transpose(0, 1).flatten().squeeze()
+            # data_timestamps = data_timestamps.flatten().squeeze()
             target = target.flatten().squeeze()
+            target_timestamp = target_timestamp.flatten().squeeze()
 
-            # data layout:
+            return data, target, target_timestamp
-            # [sample_x0, sample_y0, sample_x1, sample_y1, ...]
-            # target layout:
-            # [sample_x0, sample_y0]
-
-            return data, target

src/single-core-regen/util/eye_diagram.py

@@ -0,0 +1,418 @@
+from matplotlib import pyplot as plt
+from matplotlib.colors import LinearSegmentedColormap
+import numpy as np
+from scipy.cluster.vq import kmeans2
+import warnings
+
+from rich.traceback import install
+from rich import pretty
+from rich import print
+
+install()
+pretty.install()
+
+
+def generate_sample_data(n_symbols=1000, sps=128, noise=0.01, skew=1):
+    data = create_symbol_sequence(n_symbols, skew=skew)
+    signal = generate_signal(data, sps)
+    signal = normalization_with_noise(signal, noise)
+
+    xaxis = np.arange(0, len(signal)) / sps
+    return np.vstack([xaxis, signal])
+
+def create_symbol_sequence(n_symbols, skew=1):
+    np.random.seed(42)
+    data = np.random.randint(0, 4, n_symbols) / 4
+    data = np.pow(data, skew)
+    return tuple(data)
+
+
+def generate_signal(data, sps):
+    working_data = np.diff(data, prepend=data[0])
+    data_padded = np.zeros(len(data) * sps)
+    data_padded[::sps] = working_data
+    data_padded = np.pad(data_padded, (0, sps // 2), mode="constant")
+
+    wavelet = generate_wavelet(sps, oversample=3)
+
+    signal = np.convolve(data_padded, wavelet)
+    signal = np.cumsum(signal)
+    signal = signal[sps // 2 + len(wavelet) // 2 - 1 : -len(wavelet) // 2]
+
+    return signal
+
+
+def normalization_with_noise(signal, noise=0):
+    if noise > 0:
+        awgn = np.random.normal(0, noise * (np.max(signal) - np.min(signal)), len(signal))
+        signal += awgn
+
+    # min-max normalization
+    signal = signal - np.min(signal)
+    signal = signal / np.max(signal)
+    return signal
+
+
+def generate_wavelet(sps, oversample=3):
+    sample_points = np.linspace(
+        -oversample * sps,
+        oversample * sps,
+        2 * oversample * sps,
+        endpoint=True,
+    )
+    sigma = 0.33 / (1 * np.sqrt(2 * np.log(2))) * sps
+    pulse = 1 / (sigma * np.sqrt(2 * np.pi)) * np.exp(-np.square(sample_points) / (2 * np.square(sigma)))
+
+    return pulse
+
+
+class eye_diagram:
+    def __init__(self, data, *, channel_names=None, horizontal_bins=256, vertical_bins=1000, n_levels=4):
+        # data has shape [channels, 2, samples]
+        # each sample has a timestamp and a value
+        if data.ndim == 2:
+            data = data[np.newaxis, :, :]
+        self.channel_names = channel_names
+        self.raw_data = data
+        self.channels = data.shape[0]
+        self.n_levels = n_levels
+        self.eye_stats = [{"success": False} for _ in range(self.channels)]
+        self.horizontal_bins = horizontal_bins
+        self.vertical_bins = vertical_bins
+        self.eye_built = False
+        self.analyse(self.n_levels)
+
+    def generate_eye_data(self):
+        self.x_bins = np.linspace(0, 2, self.horizontal_bins, endpoint=False)
+        self.y_bins = np.zeros((self.channels, self.vertical_bins))
+        self.eye_data = np.zeros((self.channels, self.vertical_bins, self.horizontal_bins))
+        for i in range(self.channels):
+            data_min = np.min(self.raw_data[i, 1, :])
+            data_max = np.max(self.raw_data[i, 1, :])
+            self.y_bins[i] = np.linspace(data_min, data_max, self.vertical_bins, endpoint=False)
+            
+            t_vals = self.raw_data[i, 0, :] % 2
+            val_vals = self.raw_data[i, 1, :]
+            
+            x_indices = np.digitize(t_vals, self.x_bins) - 1
+            y_indices = np.digitize(val_vals, self.y_bins[i]) - 1
+            
+            np.add.at(self.eye_data[i], (y_indices, x_indices), 1)
+        self.eye_built = True
+
+    def plot(self, title="Eye Diagram", stats=True, show=True):
+        if not self.eye_built:
+            self.generate_eye_data()
+        cmap = LinearSegmentedColormap.from_list(
+            "eyemap",
+            [(0, "white"), (0.1, "blue"), (0.2, "cyan"), (0.5, "green"), (0.8, "yellow"), (0.9, "red"), (1, "magenta")],
+        )
+        if self.channels % 2 == 0:
+            rows = 2
+            cols = self.channels // 2
+        else:
+            cols = int(np.ceil(np.sqrt(self.channels)))
+            rows = int(np.ceil(self.channels / cols))
+        fig, ax = plt.subplots(rows, cols, sharex=True, sharey=False)
+        fig.suptitle(title)
+        ax = np.atleast_1d(ax).transpose().flatten()
+        for i in range(self.channels):
+            ax[i].set_title(self.channel_names[i] if self.channel_names is not None else f"Channel {i+1}")
+            ax[i].set_xlabel("Symbol")
+            ax[i].set_ylabel("Amplitude")
+            ax[i].grid()
+            ax[i].imshow(
+                self.eye_data[i],
+                origin="lower",
+                aspect="auto",
+                cmap=cmap,
+                extent=[self.x_bins[0], self.x_bins[-1], self.y_bins[i][0], self.y_bins[i][-1]],
+            )
+            ax[i].set_xlim((self.x_bins[0], self.x_bins[-1]))
+            ymin = np.min(self.y_bins[:, 0])
+            ymax = np.max(self.y_bins[:, -1])
+            yspan = ymax - ymin
+            ax[i].set_ylim((ymin - 0.1 * yspan, ymax + 0.1 * yspan))
+            if stats and self.eye_stats[i]["success"]:
+                ax[i].plot([0, 2], [self.eye_stats[i]["levels"], self.eye_stats[i]["levels"]], "k--")
+                ax[i].set_yticks(self.eye_stats[i]["levels"])
+                # add arrows for amplitudes
+                for j in range(len(self.eye_stats[i]["amplitudes"])):
+                    ax[i].annotate(
+                        "",
+                        xy=(0.05, self.eye_stats[i]["levels"][j]),
+                        xytext=(0.05, self.eye_stats[i]["levels"][j + 1]),
+                        arrowprops=dict(arrowstyle="<->", facecolor="black"),
+                    )
+                    ax[i].annotate(
+                        f"{self.eye_stats[i]['amplitudes'][j]:.2e}",
+                        xy=(0.06, (self.eye_stats[i]["levels"][j] + self.eye_stats[i]["levels"][j + 1]) / 2),
+                    )
+                # add arrows for eye heights
+                for j in range(len(self.eye_stats[i]["heights"])):
+                    try:
+                        bot = np.max(self.eye_stats[i]["amplitude_clusters"][j])
+                        top = np.min(self.eye_stats[i]["amplitude_clusters"][j + 1])
+
+                        ax[i].annotate(
+                            "",
+                            xy=(self.eye_stats[i]["time_midpoint"], bot),
+                            xytext=(self.eye_stats[i]["time_midpoint"], top),
+                            arrowprops=dict(arrowstyle="<->", facecolor="black"),
+                        )
+                        ax[i].annotate(
+                            f"{self.eye_stats[i]['heights'][j]:.2e}",
+                            xy=(self.eye_stats[i]["time_midpoint"] + 0.015, (bot + top) / 2 + 0.04),
+                        )
+                    except (ValueError, IndexError):
+                        pass
+                # add arrows for eye widths
+                for j in range(len(self.eye_stats[i]["widths"])):
+                    try:
+                        left = np.max(self.eye_stats[i]["time_clusters"][j][0])
+                        right = np.min(self.eye_stats[i]["time_clusters"][j][1])
+                        vertical = (self.eye_stats[i]["levels"][j] + self.eye_stats[i]["levels"][j + 1]) / 2
+
+                        ax[i].annotate(
+                            "",
+                            xy=(left, vertical),
+                            xytext=(right, vertical),
+                            arrowprops=dict(arrowstyle="<->", facecolor="black"),
+                        )
+                        ax[i].annotate(
+                            f"{self.eye_stats[i]['widths'][j]:.2e}",
+                            xy=((left + right) / 2 - 0.15, vertical + 0.01),
+                        )
+                    except (ValueError, IndexError):
+                        pass
+
+                # add area
+                for j in range(len(self.eye_stats[i]["areas"])):
+                    horizontal = self.eye_stats[i]["time_midpoint"]
+                    vertical = (self.eye_stats[i]["levels"][j] + self.eye_stats[i]["levels"][j + 1]) / 2
+                    ax[i].annotate(
+                        f"{self.eye_stats[i]['areas'][j]:.2e}",
+                        xy=(horizontal + 0.035, vertical - 0.07),
+                    )
+                
+                # add min_area above the plot
+                ax[i].annotate(
+                    f"Min Area: {self.eye_stats[i]['min_area']:.2e}",
+                    xy=(0.05, ymax + 0.05 * yspan),
+                    # xycoords="axes fraction",
+                    ha="left",
+                    va="center",
+                )
+        fig.tight_layout()
+
+        if show:
+            plt.show()
+        return fig
+
+    def analyse(self, n_levels=4):
+        warnings.filterwarnings("error")
+        for i in range(self.channels):
+            self.eye_stats[i]["channel"] = str(i+1) if self.channel_names is None else self.channel_names[i]
+            try:
+                approx_levels = eye_diagram.approximate_levels(self.raw_data[i], n_levels)
+
+                time_bounds = eye_diagram.calculate_time_bounds(self.raw_data[i], approx_levels)
+
+                self.eye_stats[i]["time_midpoint"] = (time_bounds[0] + time_bounds[1]) / 2
+
+                self.eye_stats[i]["levels"], self.eye_stats[i]["amplitude_clusters"] = eye_diagram.calculate_levels(
+                    self.raw_data[i], approx_levels, time_bounds
+                )
+
+                self.eye_stats[i]["amplitudes"] = np.diff(self.eye_stats[i]["levels"])
+
+                self.eye_stats[i]["heights"] = eye_diagram.calculate_eye_heights(
+                    self.eye_stats[i]["amplitude_clusters"]
+                )
+
+                self.eye_stats[i]["widths"], self.eye_stats[i]["time_clusters"] = eye_diagram.calculate_eye_widths(
+                    self.raw_data[i], self.eye_stats[i]["levels"]
+                )
+
+                # # check if time clusters are valid (upper bound > time_midpoint > lower bound)
+                # # if not: raise ValueError
+                # for j in range(len(self.eye_stats[i]['time_clusters'])):
+                #     if not (np.max(self.eye_stats[i]['time_clusters'][j][0]) < self.eye_stats[i]["time_midpoint"] < np.min(self.eye_stats[i]['time_clusters'][j][1])):
+                #         raise ValueError
+
+                self.eye_stats[i]["areas"] = self.eye_stats[i]["heights"] * self.eye_stats[i]["widths"]
+                self.eye_stats[i]["mean_area"] = np.mean(self.eye_stats[i]["areas"])
+                self.eye_stats[i]["min_area"] = np.min(self.eye_stats[i]["areas"])
+
+                self.eye_stats[i]["success"] = True
+            except (RuntimeWarning, UserWarning, ValueError):
+                self.eye_stats[i]["success"] = False
+                self.eye_stats[i]["time_midpoint"] = 0
+                self.eye_stats[i]["levels"] = np.zeros(n_levels)
+                self.eye_stats[i]["amplitude_clusters"] = []
+                self.eye_stats[i]["amplitudes"] = np.zeros(n_levels - 1)
+                self.eye_stats[i]["heights"] = np.zeros(n_levels - 1)
+                self.eye_stats[i]["widths"] = np.zeros(n_levels - 1)
+                self.eye_stats[i]["areas"] = np.zeros(n_levels - 1)
+                self.eye_stats[i]["mean_area"] = 0
+                self.eye_stats[i]["min_area"] = 0
+
+        warnings.resetwarnings()
+
+    @staticmethod
+    def approximate_levels(data, levels):
+        amplitudes = data[1]
+        grouping_data = amplitudes.reshape(-1, 1)
+
+        kmeans, clusters = eye_diagram.kmeans_cluster(grouping_data, levels)
+
+        centroids = np.zeros(levels)
+        for i in range(levels):
+            centroids[i] = eye_diagram.shorth(clusters[i])
+
+        return np.sort(centroids)
+
+    @staticmethod
+    def kmeans_cluster(data, levels):
+        working_data = data.reshape(-1, 1)
+        # initial = np.linspace(np.min(working_data), np.max(working_data), levels).reshape(-1, 1)
+        kmeans = kmeans2(working_data, levels, iter=100, minit="++")
+
+        order = np.argsort(kmeans[0].squeeze())
+        kmeans[0][:] = kmeans[0][order]
+        order = np.argsort(order)
+        kmeans[1][:] = order[kmeans[1]]
+
+        clusters = [[] for _ in range(levels)]
+        for i, elem in enumerate(data):
+            clusters[kmeans[1][i]].append(elem.squeeze())
+        clusters = [np.array(cluster) for cluster in clusters]
+
+        # clusters = [clusters[i] for i in order]
+
+        return kmeans, clusters
+
+    @staticmethod
+    def shorth(data):
+        working_data = np.sort(data)
+        n = len(working_data)
+        h = n // 2 + 1
+        min_diff = np.inf
+        interval = np.zeros(2)
+        for i in range(n - h):
+            diff = working_data[i + h] - working_data[i]
+            if diff < min_diff:
+                min_diff = diff
+                interval = [working_data[i], working_data[i + h]]
+        return np.mean(interval)
+
+    @staticmethod
+    def calculate_time_bounds(data, level_centroids):
+        n_levels = 2
+
+        # prepare data
+        selection_range = eye_diagram.calc_selection_range(level_centroids[1:3], 0.01)
+
+        # times = np.arange(0, len(data), dtype=np.float32)
+        times, amplitudes = data
+        grouping_data = times[(amplitudes > selection_range[0]) & (amplitudes < selection_range[1])]
+        grouping_data = grouping_data % 2
+        grouping_data = grouping_data.reshape(-1, 1)
+
+        kmeans, clusters = eye_diagram.kmeans_cluster(grouping_data, n_levels)
+
+        # time_midpoint = (np.min(clusters[1]) + np.max(clusters[0]))/2
+
+        # # check if time clusters are valid (upper bound > time_midpoint > lower bound)
+        # # if not: raise ValueError
+        # if not (np.max(clusters[0]) < time_midpoint < np.min(clusters[1])):
+        #     raise ValueError
+
+        return np.min(clusters[1]), np.max(clusters[0])
+
+    @staticmethod
+    def calc_selection_range(data, tolerance):
+        middle = np.mean(data)
+        tol = tolerance * np.abs(np.diff(data))
+        return (middle - tol, middle + tol)
+
+    @staticmethod
+    def calculate_levels(data, level_centroids, time_bounds):
+        selection_range = eye_diagram.calc_selection_range(time_bounds, 0.025)
+
+        times, amplitudes = data
+        indices = np.arange(0, len(times))
+        filtered_time = indices[((times % 2) > selection_range[0]) & ((times % 2) < selection_range[1])]
+        filtered_data = amplitudes[filtered_time]
+
+        vertical_bounds = np.array([
+            -np.inf,
+            *[(level_centroids[i] + level_centroids[i + 1]) / 2 for i in range(len(level_centroids) - 1)],
+            np.inf,
+        ])
+
+        central_level_means = np.zeros(len(level_centroids))
+        amplitude_clusters = []
+        for i in range(len(level_centroids)):
+            amplitude_filtered_data = filtered_data[
+                (filtered_data > vertical_bounds[i]) & (filtered_data < vertical_bounds[i + 1])
+            ]
+            amplitude_clusters.append(amplitude_filtered_data)
+            central_level_means[i] = np.mean(amplitude_filtered_data)
+
+        # # check if amplitude clusters are valid (upper bound > level_midpoint > lower bound)
+        # # if not: raise ValueError
+        # for j in range(len(amplitude_clusters)):
+        #     level_midpoint = (central_level_means[j] + central_level_means[j+1]) / 2
+        #     if not (np.max(amplitude_clusters[0]) < level_midpoint < np.min(amplitude_clusters[1])):
+        #         raise ValueError
+
+        return central_level_means, amplitude_clusters
+
+    @staticmethod
+    def calculate_eye_heights(amplitude_clusters):
+        eye_heights = np.zeros(len(amplitude_clusters) - 1)
+        for i in range(len(amplitude_clusters) - 1):
+            eye_heights[i] = np.min(amplitude_clusters[i + 1]) - np.max(amplitude_clusters[i])
+        return eye_heights
+
+    @staticmethod
+    def calculate_eye_widths(data, central_level_means):
+        n_levels = len(central_level_means)
+
+        widths = np.zeros(n_levels - 1)
+
+        times, amplitudes = data
+        clusters = []
+        for i in range(n_levels - 1):
+            selection_range = eye_diagram.calc_selection_range(
+                [central_level_means[i], central_level_means[i + 1]], 0.01
+            )
+            grouping_data = times[(amplitudes > selection_range[0]) & (amplitudes < selection_range[1])]
+            grouping_data = grouping_data % 2
+            grouping_data = grouping_data.reshape(-1, 1)
+            kmeans, cluster = eye_diagram.kmeans_cluster(grouping_data, 2)
+            clusters.append(cluster)
+            widths[i] = np.min(cluster[1]) - np.max(cluster[0])
+            ...
+        return widths, clusters
+
+
+if __name__ == "__main__":
+    length = int(2**14)
+    # data = generate_sample_data(length, noise=1)
+    # data1 = generate_sample_data(length, noise=0.01)
+    # data2 = generate_sample_data(length, noise=0.01, skew=1.2)
+    # data3 = generate_sample_data(length, noise=0.02)
+
+    # data = np.stack([data, data1, data2, data3])
+
+    data = generate_sample_data(length, noise=0.005)
+    eye = eye_diagram(data, horizontal_bins=256, vertical_bins=256)
+    attrs = ("success", "amplitudes", "time_midpoint", "levels", "heights", "widths", "area", "mean_area", "min_area")
+    for i, channel in enumerate(eye.eye_stats):
+        print(f"Channel {i}")
+        print_data = {attr: channel[attr] for attr in attrs}
+        print(print_data)
+
+    eye.plot()