added in confusion matrix for the output

scripts/model_builder/plot_data.py

@@ -17,11 +17,13 @@ def load_validation_data():
        "data/dataset/val.h5", label_name="modulation", data_key="validation_data"
    )
 
-    X = np.stack([x.numpy() for x, _ in val_dataset])  # shape: (N, C, L)
+
+   x = np.stack([x.numpy() for x, _ in val_dataset])  # shape: (N, C, L)
    y = np.array([y.item() for _, y in val_dataset])  # shape: (N,)
    class_names = list(val_dataset.label_encoder.classes_)
 
-    return X, y, class_names
+
+   return x, y, class_names
 
 
 def build_model_from_ckpt(
@@ -44,22 +46,27 @@ def build_model_from_ckpt(
    return model
 
 
+
+
 def evaluate_checkpoint(ckpt_path: str):
    """
    Loads the model from checkpoint and evaluates it on a validation set.
    Prints classification metrics and plots a confusion matrix.
    """
 
+
    # Load validation data
    X_val, y_true, class_names = load_validation_data()
    num_classes = len(class_names)
    in_channels = X_val.shape[1]
 
+
    # Load model
    model = build_model_from_ckpt(
        ckpt_path, in_channels=in_channels, num_classes=num_classes
    )
 
+
    # Inference
    y_pred = []
    with torch.no_grad():
@@ -69,13 +76,16 @@ def evaluate_checkpoint(ckpt_path: str):
            pred = torch.argmax(logits, dim=1).item()
            y_pred.append(pred)
 
+
    # Print classification report
    print("\nClassification Report:")
    print(
        classification_report(y_true, y_pred, target_names=class_names, zero_division=0)
    )
   
-    plot_confusion_matrix_with_counts(
+  
+  
+   print_confusion_matrix(
        y_true=np.array(y_true),
        y_pred=np.array(y_pred),
        classes=class_names,
@@ -84,7 +94,9 @@ def evaluate_checkpoint(ckpt_path: str):
    )
 
 
-def plot_confusion_matrix_with_counts(
+
+
+def print_confusion_matrix(
    y_true: np.ndarray,
    y_pred: np.ndarray,
    classes: list[str],
@@ -94,6 +106,7 @@ def plot_confusion_matrix_with_counts(
    """
    Plot a confusion matrix showing both raw counts and (optionally) normalized values.
 
+
    Args:
        y_true: true labels (integers 0..C-1)
        y_pred: predicted labels (same shape as y_true)
@@ -102,43 +115,60 @@ def plot_confusion_matrix_with_counts(
        title: title for the plot
    """
    # 1) build raw CM
-    C = len(classes)
-    cm = np.zeros((C, C), dtype=int)
+   c = len(classes)
+   cm = np.zeros((c, c), dtype=int)
    for t, p in zip(y_true, y_pred):
        cm[t, p] += 1
       
+  
    # 2) normalize if requested
    if normalize:
        with np.errstate(divide="ignore", invalid="ignore"):
            cm_norm = cm.astype(float) / cm.sum(axis=1)[:, None]
            cm_norm = np.nan_to_num(cm_norm)
+       print_confusion_matrix_helper(cm_norm, classes)
    else:
-        cm_norm = cm
+       print_confusion_matrix_helper(cm, classes)
 
-    # 3) plot
-    fig, ax = plt.subplots(figsize=(8, 8))
-    im = ax.imshow(cm_norm, interpolation="nearest")
-    ax.set_title(title)
-    ax.set_xlabel("Predicted label")
-    ax.set_ylabel("True label")
-    ax.set_xticks(np.arange(C))
-    ax.set_yticks(np.arange(C))
-    ax.set_xticklabels(classes, rotation=45, ha="right")
-    ax.set_yticklabels(classes)
 
-    # 4) annotate
-    for i in range(C):
-        for j in range(C):
-            count = cm[i, j]
-            val = cm_norm[i, j]
-            txt = f"{count}\n{val:.2f}"
-            ax.text(j, i, txt, ha="center", va="center")
 
-    fig.colorbar(im, ax=ax, label="Normalized value" if normalize else "Count")
-    plt.tight_layout()
-    plt.show()
+
+import numpy as np
+
+def print_confusion_matrix_helper(matrix, classes=None, normalize=False, digits=2):
+    """
+    Pretty prints a confusion matrix with x/y labels.
+
+    Parameters:
+    - matrix: square 2D numpy array
+    - labels: list of class labels (default: range(num_classes))
+    - normalize: whether to normalize rows to sum to 1
+    - digits: number of decimal places to show for normalized values
+    """
+    matrix = np.array(matrix)
+    num_classes = matrix.shape[0]
+    labels = classes or list(range(num_classes))
+    
+    # Header
+    print(" " * 9 + "Ground Truth →")
+    header = "Pred ↓ | " + "  ".join([f"{str(label):>6}" for label in labels])
+    print(header)
+    print("-" * len(header))
+    
+    # Rows
+    for i in range(num_classes):
+        row_vals = matrix[i]
+        if normalize:
+            row_sum = row_vals.sum()
+            row_vals = row_vals / row_sum if row_sum != 0 else row_vals
+            row_str = "  ".join([f"{val:>6.{digits}f}" for val in row_vals])
+        else:
+            row_str = "  ".join([f"{int(val):>6}" for val in row_vals])
+        print(f"{str(labels[i]):>7} | {row_str}")
 
       
 if __name__ == "__main__":
    settings = get_app_settings()
    evaluate_checkpoint(os.path.join("checkpoint_files", "inference_recognition_model.ckpt"))
+
+