Last week I stumbled about a bug in imshow, which can easily be reproduced by doing the following:
>>> from pylab import *
Note that the y-axis is wrong and resizing makes this even worse.
I tried versions 0.71 to 0.80 which show all the same behaviour.
It is obviously the aspect='preserve' option, that introduces this bug.
So I'd like to address two issues:
First of course I'd like to ask if this bug could be fixed since constant aspect ratio is very crucial for me.
Second it seems that the plotting area is always maximum size and the aspect='preserve' option just rescales the axis. I think it would be more natural to rescale the plotting area.