The class 'tripcolor' in matplotlib gives a very powerful tool to create a contour-style plot for those 2D-triangles just like:
plt.tripcolor(x,y,triangles,vars,cmap='PuOr')
Though there are many types of defined colormaps for usage, but now I cannot find a proper method just for pure color filling for these triangles. Does anybody know how to do it? Thanks for telling me.
It feels rather strange, but it seems the easiest solution to have a tripcolor plot filled with a single color is to create a colormap which only has a single color in it and supply it to the tripcolor.
import matplotlib.pyplot as plt
import numpy as np
import matplotlib.colors
xy = np.asarray([ [-0.01, 0.9], [-0.1, 0.8], [-0.05, 0.6], [-0.08, 0.9]])
triangles = np.asarray([[3, 2, 0] , [3, 1, 2], [ 0, 2, 1] , [0, 1, 2]])
# generate some array of length same as xy
c = np.ones(len(xy))
# create a colormap with a single color
cmap = matplotlib.colors.ListedColormap("limegreen")
# tripcolorplot with a single color filling:
plt.tripcolor(xy[:,0],xy[:,1],triangles, c, edgecolor="k", lw=2, cmap=cmap)
plt.show()
