# Interpolate value of point

5 views (last 30 days)
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)

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 on 9 Feb 2021
Edited: Aleksey Gureev on 9 Feb 2021
Hello. Thank you for your answer. How can I use it? I tried like this
interp2(X, Y, V, 0, 0) - if I want to get at x = 0, y = 0, but It doen't work for me. Numbers in X and Y not monotonic.
Aleksey Gureev on 9 Feb 2021
Solved
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)

### Categories

Find more on Interpolation in Help Center and File Exchange

R2020b

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!