How to install matplotlib?

[broccolee]

Hi,

I get the following error when I tried to install matplotlib:

/* -----------------------------------------------------------------------

Installing collected packages: numpy, pyparsing, matplotlib
Found existing installation: numpy 1.5.1
Cannot uninstall 'numpy'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.
----- Failed to install 'matplotlib' -----

---------------*/

How can I troubleshoot this?

Thanks.