Issue with low values for surf and colorbar
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I was getting issues with colorbar in some of my work, so I went in to dig in the issue, and found out that surf and colorbar have weird behaviors for low values. I am using the student version 7.14.0.739 (R2012a). When I type :
surf(peaks(30))
It's all good and I get the expected plot :
But when I use a (much) smaller peaks, like in
surf(1e-7 * peaks(30))
I get no surface displayed, as below :
While pcolor still works fine, colorbar however cannot keep up, and only half of it appears in the wrong position, as in
pcolor(1e-7 * peaks(30))
colorbar
gives the following :
I am unsure but do not think the issue happens on non-student versions. Anyway, a little info on how to deal with it (apart from playing around with bigger values and renaming colorbar ticks) would be much appreciated.
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Accepted Answer
Kelly Kearney
on 8 Oct 2013
Looks like an OpenGL issue. Try
set(gcf, 'renderer', 'zbuffer');
You can read up more on this, and possibly find some workarounds, here: http://www.mathworks.com/help/matlab/ref/figure_props.html#Renderer
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