plot_metrics.py

import json
import pandas as pd
import matplotlib.pyplot as plt
import os

# Classification Metrics
try:
    with open('outputs/classification/training_history.json', 'r') as f:
        cls_history = json.load(f)
    
    epochs = [x['epoch'] for x in cls_history]
    train_loss = [x['train_loss'] for x in cls_history]
    val_loss = [x['val_loss'] for x in cls_history]
    val_auc = [x['val_auc_roc'] for x in cls_history]

    plt.figure(figsize=(12, 5))
    plt.subplot(1, 2, 1)
    plt.plot(epochs, train_loss, label='Train Loss')
    plt.plot(epochs, val_loss, label='Val Loss')
    plt.title('Classification Loss (ViT+LoRA)')
    plt.xlabel('Epoch')
    plt.ylabel('Loss')
    plt.legend()

    plt.subplot(1, 2, 2)
    plt.plot(epochs, val_auc, label='Val AUC-ROC', color='green')
    plt.title('Classification AUC-ROC')
    plt.xlabel('Epoch')
    plt.ylabel('AUC-ROC')
    plt.legend()

    plt.tight_layout()
    plt.savefig('classification_metrics.png')
    plt.close()
except Exception as e:
    print("Error plotting classification:", e)


import csv

# Detection Metrics
try:
    epochs = []
    mAP50 = []
    mAP50_95 = []
    
    with open('runs/detect/outputs/detection/yolov8_tn50002/results.csv', 'r') as f:
        reader = csv.DictReader(f)
        # Strip spaces from column names
        reader.fieldnames = [name.strip() for name in reader.fieldnames]
        
        for row in reader:
            epochs.append(int(row['epoch']))
            mAP50.append(float(row['metrics/mAP50(B)']))
            mAP50_95.append(float(row['metrics/mAP50-95(B)']))
    
    plt.figure(figsize=(8, 5))
    plt.plot(epochs, mAP50, label='mAP@50')
    plt.plot(epochs, mAP50_95, label='mAP@50-95')
    plt.title('Detection mAP (YOLOv8)')
    plt.xlabel('Epoch')
    plt.ylabel('mAP')
    plt.legend()
    plt.tight_layout()
    plt.savefig('detection_metrics.png')
    plt.close()
except Exception as e:
    print("Error plotting detection:", e)

print("Plotting complete.")