Using matplotlib inside BGE

Trying to simulate a robot. Matplotlib, numpy, etc. are all installed on my system, but obviously blender has its own independent version of Python, because at the moment

import matplotlib

turns up an ImportError.

How do I point blender’s python to matplotlib?

The easiest way to use any external Python module would be to include it in the game folder, if possible. From there, the import statement should work. If it’s more complex than that (i.e. you needed to actually install it), then I’m not sure how to add it in (or if it’s possible).

Matplotlib is quite a big thing, has its own dependencies and I think half of it’s written in C. Can I not simply change some PATH type variable somewhere in Blender?