[Octave-bug-tracker] [bug #42766] incorrect color patches for countourf with NaNs in data

[John Hunt]

Follow-up Comment #3, bug #42766 (project octave):

Thanks for the '-Inf' workaround. 
It has proven useful in another case
<http://stackoverflow.com/a/26692915/3565696>

Sometimes '+inf' is better.

Here is a case where neither '-inf' or '+inf' work.
(in bothsides-inf.png; the upper stripe should be in dark red)

[x, y] = ndgrid(0:10:100, 0:10:100);
data = x + y;
data(data > 150) = NaN;
data(data < 50) = NaN;
data(isnan(data)) = -inf;
c = contourf(x, y, data);


using +inf is worse (resulting in bothsides+inf.png).

(file #32352, file #32353)
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Additional Item Attachment:

File name: bothsides-inf.png              Size:102 KB
File name: bothsides+inf.png              Size:89 KB


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