[Matplotlib-users] Combining pcolormesh and contour

[Andreas H. <li...@hi...>]

Good morning,

I'm creating the attached plot using pcolormesh(). What I would like to
do now is draw contour lines at +/- 2.5%, which follow the grid edges.

The problem is that when I use contour(), the lines drawn do not follow
the grid edges but seem to be interpolated somehow.

Do you have an idea how to draw the contour lines following the grid edges?

Your insight is very much appreciated :)

Cheers,
Andreas.