Matplotlib Colormap
This a small tutorial for making custom color map for matplotlib .
You can also check the documentary page here .
One simple way to make the colormap is using the available colours.
Here is a simple example .
import matplotlib.pyplot as plt
from matplotlib import colors
import numpy as np
zvals = np.random.rand(10, 10)
#cmap=colors.LinearSegmentedColormap.from_list("mycolor",['white', 'red','green','black'])
cmap=colors.LinearSegmentedColormap.from_list("mycolor",['white','black'])
img = plt.imshow(zvals, interpolation='nearest', origin='lower',cmap=cmap)
from matplotlib import colors
import numpy as np
zvals = np.random.rand(10, 10)
#cmap=colors.LinearSegmentedColormap.from_list("mycolor",['white', 'red','green','black'])
cmap=colors.LinearSegmentedColormap.from_list("mycolor",['white','black'])
img = plt.imshow(zvals, interpolation='nearest', origin='lower',cmap=cmap)
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