I have a simple problem in python and matplotlib.
I have 3 lists : x, y and rho with rho[i] a density at the point x[i], y[i].
All values of x and y are between -1. and 1. but they are not in a specific order.
How to make a contour plot (like with imshow) of the density rho (interpolated at the points x, y).
Thank you very much.
EDIT : I work with large arrays : x, y and rho have between 10,000 and 1,000,000 elements