On Wed, Aug 31, 2011 at 3:50 PM, Alexa Villaume <alexa7890@gmail.com> wrote:
41, 25

Yes, you have it backwards.  The first axis of O3 is the rows, while the second axis is the columns.  Keep in mind that Python and NumPy follow C array conventions while Matlab (and IDL?) follow Fortran array conventions.

So, either transpose O3, or swap x and y in the call to contourf.

Ben Root