Interpolate value of point

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Aleksey Gureev
Aleksey Gureev on 9 Feb 2021
Commented: Aleksey Gureev on 9 Feb 2021
Hello. I have a sufrace like on the image.How can I interpolate z-value (black cross) from this surface? I need the fastest methos (linear, for example)

Accepted Answer

Bob Thompson
Bob Thompson on 9 Feb 2021
I'm assuming you have the data for the surface points. If so, I believe interp2 will do what you're asking.
Aleksey Gureev
Aleksey Gureev on 9 Feb 2021
xv = linspace(min(x), max(x), 20);
yv = linspace(min(y), max(y), 20);
[X,Y] = meshgrid(xv, yv);
Z = griddata(x,y,z,X,Y);
interp2(X, Y, V, 0, 0)

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