You are reading documentation for the unreleased version of Matplotlib. Try searching for the released version of this page instead?
Version 2.1.1.post1080+g0db0992
matplotlib
Fork me on GitHub

This Page

mpl_toolkits.mplot3d.proj3d.transform

mpl_toolkits.mplot3d.proj3d.transform(xs, ys, zs, M)

Transform the points by the projection matrix