Default dpi for savefig

Hi, I'm a little bit lost with respect to setting the

    > resolution of images saved in png. The matplotlibrc file
    > sets the dpi to 80, but the default keyword argument of
    > savefig is set to 150. Thus, changing the rc setting to
    > dpi=300 does not modify savefig's default behaviour. Is
    > there a way to set a default dpi that would be used when
    > calling savefig ?

Have you tried modifying the rc setting

savefig.dpi : 100 # figure dots per inch

Should work..