I imagine not, as the version of matplotlib in the repository seems to be "1.1.1~rc2-1" and python3 support only came about with version 1.2. Version 1.4 has been released today, by the way. (Support for Python 3.4 requires matplotlib 1.4!)
Now how can we get version 1.4 available for Raspbian Wheezy? How might I help?