Python Matplotlib Colormap

Question

I use the colormap \"jet\" to plot my graphics. But, I would like to have the lower values in white color and this colormap goes from blue to red colors. I also don\'t want

Answer 1

There is another way to do the same without defining a new colobar. You can use the cmap.set_under method that defines the color to be used for all values below a given threshold. The threshold is defined during the pcolormesh :

from matplotlib.pyplot import *
import numpy as np

mycmap = cm.get_cmap('jet')
mycmap.set_under('w')

pcolor(np.random.rand(10,10), cmap=mycmap, vmin=.1)
colorbar()
show()