matplotlib.github.com/cmocean/index-10.py at main · matplotlib/matplotlib.github.com · GitHub

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import cmocean

import matplotlib.pyplot as plt

cmap = cmocean.cm.topo

fig, axes = plt.subplots(1, 2, figsize=(8,4))

A = np.random.randint(-50, 201, (10,10))

mappable = axes[0].pcolormesh(A, vmin=-200, vmax=200, cmap=cmap)

axes[0].set_title('No values<-50, but still\nshow possibility in colorbar')

fig.colorbar(mappable, ax=axes[0])

newcmap = cmocean.tools.crop(cmap, -50, 200, 0)

mappable = axes[1].pcolormesh(A, vmin=-50, vmax=200, cmap=newcmap)

axes[1].set_title('Colorbar only shows color\nrange used by data')

fig.colorbar(mappable, ax=axes[1])

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