how show values *decreasing* up the y-axis like in a pcolor plot?

Hi - However, if you interact with the window (zoom in)

    > than this information is lost. It would be nice to be
    > able to set a permanant attritute for the axis,
    > yaxis.reversed = True, or some such thing.

I assume you are working with an older version of matplotlib....
Gergory fixed this (I can't remember the version number it was fixed
din ) but it works as of the latest release.