颜色映射规格化

演示使用规范以非线性方式将颜色映射映射到数据上。

颜色映射规格化示例

  1. import numpy as np
  2. import matplotlib.pyplot as plt
  3. import matplotlib.colors as colors
  5. '''
  6. Lognorm: Instead of pcolor log10(Z1) you can have colorbars that have
  7. the exponential labels using a norm.
  8. '''
  9. N = 100
  10. X, Y = np.mgrid[-3:3:complex(0, N), -2:2:complex(0, N)]
  12. # A low hump with a spike coming out of the top right.  Needs to have
  13. # z/colour axis on a log scale so we see both hump and spike.  linear
  14. # scale only shows the spike.
  15. Z = np.exp(-X**2 - Y**2)
  17. fig, ax = plt.subplots(2, 1)
  19. pcm = ax[0].pcolor(X, Y, Z,
  20.                    norm=colors.LogNorm(vmin=Z.min(), vmax=Z.max()),
  21.                    cmap='PuBu_r')
  22. fig.colorbar(pcm, ax=ax[0], extend='max')
  24. pcm = ax[1].pcolor(X, Y, Z, cmap='PuBu_r')
  25. fig.colorbar(pcm, ax=ax[1], extend='max')
  27. plt.show()

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