Which version of matplotlib are you using? Also, do you have an example
dataset and a simple, self-contained example to demonstrate this?
Chances are, there are NaNs occurring in the calculation, but since we have
code elsewhere that handles NaNs properly, it probably isn't impacting your
graph. H
Using pyplot.contour, I'm getting
/usr/lib/pymodules/python2.7/matplotlib/contour.py:374: RuntimeWarning: invalid
value encountered in true_divide
dist = np.add.reduce(([(abs(s)[i]/L[i]) for i in range(xsize)]),-1)
although the resulting plot seems to be ok.
Keith
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