Maybe this is worth reviewing and refining: seems like all the parts are there, as I suspected. 

http://telliott99.blogspot.com/2011/07/matplotlib-on-os-x-lion-revised.html


BTW, whatever you do, do not follow the instructions that the matplotlib developers provide. You do not need another Python, including MacPython or the Endthought distribution or anything else..
--
Paul Beard

Are you trying to win an argument or solve a problem?