Extract 1D profile from 2D or 3D grid

[Marc Saudreau]

Hi everyone,
 I'm trying to use Fipy to solve a 2D heat transfer problem, and I need to
extract from my 2D grid, some 1D profiles. For instance I need to plot  
temperature versus y axis for x given.
I had a look at Fipy examples but I did not find any way to do it.
Thanks a lot for any help.

 Best regards,

   Marc