Interpolation of 3D grid data

Asked Feb 03 '19 at 14:51

Active Feb 03 '19 at 17:45

Viewed 512 times

I have six point in 3D plot. For example:

x = [2, 28 , 44, 33, 10, 19]
y = [23, 49, 8, 42, 32, 19]
z = [23.5955, 23.7141, 23.7410, 23.5603, 23.7948, 23.6131]

In matlab I can use griddata function and the result:

3D Plot results:

Now I need do the same interpolation in C in LabWIndows. I search internet and I don't find source code or example in C how to do linear interpolation in 3D grid plot. Someone can help in the topic? In LabWindows I can use OpenGL also.

edited Feb 03 '19 at 17:45

Rabbid76

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asked Feb 03 '19 at 14:51

Rariusz

Is it just linear interpolation? If not, which type of interpolation you need? – Mauricio Cele Lopez Belon Feb 03 '19 at 18:06
At the start linear. Then maybe cubic etc. – Rariusz Feb 03 '19 at 18:11
Perhaps you can find good C samples in John Burkardt's code library: https://people.sc.fsu.edu/~jburkardt/c_src/c_src.html (e.g. the code of BLEND) – Mauricio Cele Lopez Belon Feb 04 '19 at 19:29
I don't understand your graph. 6 points in 3D define a 1D curve. I don't see how you can interpolate a 2D plot. Is it a minimal surface ? – dargaud Sep 11 '19 at 11:26

Interpolation of 3D grid data

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