Jeff's HSV Colormap in Matplotlib

jeffs_HSV_colormap_demo.py

from pylab import *
cdict = {
'red'  :  ((0.00, 0.00, 0.00), 
           (0.20, 0.00, 0.00),
           (0.40, 0.00, 0.00),
           (0.60, 0.00, 0.00),
           (0.80, 1.00, 1.00),  
           (1.00, 1.00, 1.00)),
'green':  ((0.00, 0.00, 0.00), 
           (0.20, 0.00, 0.00),
           (0.40, 1.00, 1.00),
           (0.60, 1.00, 1.00),
           (0.80, 1.00, 1.00),  
           (1.00, 0.00, 0.00)),
'blue' :  ((0.00, 0.00, 0.00), 
           (0.20, 1.00, 1.00),
           (0.40, 1.00, 1.00),
           (0.60, 0.00, 0.00),
           (0.80, 0.00, 0.00),  
           (1.00, 0.00, 0.00)),
}
custom_cmap = matplotlib.colors.LinearSegmentedColormap('jeffs_HSV',cdict,256)

#a demo 2d gaussian
L = linspace(-5,5,100)
X,Y = meshgrid(L,L)
Z = 2.0*exp(-(X**2 + Y**2)/10.0) - 1.0

imshow(Z,aspect='auto',cmap = custom_cmap,origin="lower", vmin=-1.0, vmax=1.0)
colorbar()
savefig("jeffs_HSV_colormap.png")