Hello,

I have the following problem. I want the axes (only the y-axis, to be exact)
of a imshow() graph to be nonlinear. By default, the axis goes linearily
from 0 to (number of pixels). With the [extent] keyword, I can change that
to going linearly from (arbitrary start) to (arbitrary end). Now, I'd like
the axis to be dependend on a (bijective) arbitrary function, for example
y=p^2 (when p is the pixel number and y the y-axis coordinate).
How can I achieve this?
Thanks a lot, cheers

Thomas
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