The interpolation algorithm used in imshow() can produce spurious
results, as has been noted before:
http://article.gmane.org/gmane.comp.python.matplotlib.general/12062
This happens because the data is converted to RGB before the
interpolation/resampling, rather than after. How hard would it be to
reverse this so that the data array is first interpolated & resampled
and then converted by cmap to RGB?
Andrew Hawryluk
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