Aliasing when saving matplotlib filled contour plot to .pdf or .eps

Question

I\'m generating a filed contour plot with the matplotlib.pyplot.contourf() function. The arguments in the call to the function are:

contourf(xvec,xvec,w,leve         


        

Answer 1

After using the useful answer by @pelson for a while, I finally found a proper solution to this long-standing problem (currently in Matplotlib 2.0), which does not require multiple calls to contour or rasterizing the figure.

I refer to my original answer here for a more extensive explanation and examples.

In summary, the solution consists of the following lines:

cnt = plt.contourf(x, y, z)

for c in cnt.collections:
    c.set_edgecolor("face")

plt.savefig('test.pdf')