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Create a triangular correlation plot (triangular heatmap)
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| import numpy as np | |
| import seaborn as sns | |
| from scipy.ndimage import rotate | |
| def plot_heatmap_triu(m, shape=(10,10)): | |
| """ | |
| Plot a symmetric matrix as a triangluar heatmap. | |
| - m: 2d ndarray of numpy (symmetric) | |
| - shape of the final image (optional) | |
| """ | |
| rotated = rotate(np.triu(np.nan_to_num(m)), angle=45) | |
| sns.plt.figure(figsize=shape) | |
| sns.heatmap(rotated[:(int(rotated.shape[0]/2)),:], | |
| xticklabels=False, | |
| yticklabels=False, | |
| cbar=False) | |
| m = [[1, 2, 3], | |
| [2, 5, 6], | |
| [3, 6, 2]] | |
| plot_heatmap_triu(m) |
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