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This article introduces the relevant knowledge of "how to take out the color range of colomap in python". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Usually when we draw a color map, we often use a variety of colormap, but some of the colormap color marks provided by python are sometimes not suitable and need to be cropped and used.

The link to the colormap example on the official website is as follows:

Colormap

This paper provides a method to extract a part of the colormap color code and take out the satisfactory color code area. Take jet as an example to demonstrate

Import matplotlib.pyplot as pltfrom mpl_toolkits.axes_grid1 import make_axes_locatableimport numpy as npfrom matplotlib.colors import ListedColormap, LinearSegmentedColormapax = plt.subplot () cmap=plt.get_cmap ('jet') newcolors=cmap (np.linspace (0,1,256)) newcmap = ListedColormap (newcolors [57GV 245]) im = ax.imshow (np.arange (10,10)), cmap=newcmap) # create an axes on the right side of ax. The width of cax will be 5% # of ax and the padding between cax and ax will be fixed at 0.05inch.divider = make_axes_locatable (ax) cax= divider.append_axes ("right", size= "5", pad=0.05) plt.colorbar (im, cax=cax) plt.show ()

Before the change:

After modification:

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