import numpy as np
import matplotlib.pyplot as plt
import os

file_path = "ERA5_data/weight_matrix.npy"

def main():

    weight_matrix = np.load(file_path)
    print(f"Loaded weight_matrix.npy with shape: {weight_matrix.shape}")

    plt.figure(figsize=(8, 6))
    im = plt.imshow(weight_matrix.T, cmap='viridis', origin='lower', aspect='auto')
    plt.colorbar(im, label='Weight')
    plt.title('Weight Matrix Heatmap')
    plt.xlabel('X Grid Index (64)')
    plt.ylabel('Y Grid Index (32)')

    output_path = "weight_matrix_heatmap.png"
    plt.tight_layout()
    plt.savefig(output_path)
    print(f"Heatmap saved to {output_path}")

if __name__ == "__main__":
    main()