I have a square array of elements which correspond to lattice sites. Some of the elements are zero and the rest vary between 1 and about 2700. Using imshow and the OrRd colour map, I want all lattice sites greater than 0 to display the corresponding colour but importantly, all sites with value 0 to be displayed as black. I have tried defining a new color map as follows: colors = [(0,0,0)] + [(pylab.cm.OrRd(i)) for i in range(1,256)] new_map = matplotlib.colors.LinearSegmentedColormap.from_list('new_map', colors, N=256) but the range of values in my array is too large and so a lot of non-zero values get displayed as black. Many thanks. Continue reading...
