How to plot contour plot with NaN in matrix ?
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I have three matrices xvalues (X), yvalues (Y) and measured property (Z). All these three are upper triangular matrices with lower triangular part containing NaN values. How do I plot a contour plot only for the upper triangular part?
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Star Strider
on 10 Dec 2014
Edited: Star Strider
on 10 Dec 2014
If you plotted it as it currently exists, the NaN values would simply not plot anything, that is be blank areas of the contour plot.
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Star Strider
on 12 Dec 2014
I have no idea what you’re doing, but you can see what the result is if you replace the contourf plot with surfc:
surfc(X,Y,Z)
To see only ‘Z’:
surfc(Z)
The problems with ‘X’ and ‘Y’ can be seen if you plot them:
surfc(X)
surfc(Y)
The point is that ‘X’ and ‘Y’ are not linear, and ‘Z’ seems not to exist along the diagonal.
I’ll leave you to sort these. The plotting is trivial once you deal with whatever is going on with your data.
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