[Matplotlib-users] pcolor/imshow

[Peter G. <pgr...@ge...>]

The pcolor_demo.py and pcolor_demo2.py show somewhat different results:

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from matplotlib.matlab import *

def fun3(x,y):
    return (1- x/2 + x**5 + y**3)*exp(-x**2-y**2)

xi=arange(-3.0, 3.0, 0.05)
yi=arange(-3.0, 3.0, 0.05)
[Xi,Yi]=meshgrid(xi,yi);
Zi=fun3(Xi,Yi)    

if 1:
   cMap = ColormapJet(256)
   imshow(Zi, cMap)
   gca().set_image_extent(-3, 3, -3, 3)
else:
   pcolor(Xi, Yi, Zi, shading='flat')

show()


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The y axis seem to be inverted on imshow when compared to pcolor. Was 
this intentional?