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python display image with non-linear axes
import matplotlib.pyplot as plt
import numpy as np
x = np.logspace(1, 3, 5)
y = np.linspace(0, 2, 3)
z = np.linspace(0, 1, 4)
Z = np.vstack((z, z))
plt.imshow(Z, extent=[10, 1000, 0, 1], cmap='gray')
plt.axvline(100, color='red')
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