Matplotlib plots not showing up in Mac OSX?

Question

I am running Mac OSX 10.5.8. I installed matplotlib using macports. I get some examples from the matplotlib gallery like this one, without modification:

http://matpl

Answer 1

just to add a note,

The matplotlibrc file was not present on my system and I had to to download a copy from the matplotlib website. Future users may have to do the same.