How to plot a surf-plot without data extrapoation?

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Philippe Corner 2020-12-3

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https://ww2.mathworks.cn/matlabcentral/answers/676633-how-to-plot-a-surf-plot-without-data-extrapoation

编辑： Walter Roberson 2021-8-8

采纳的回答： KSSV

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I would like to plot the same surf plot but without extrapolating on areas where are not scatter data.

The following script generates the attached figure.

The final plot should interpolate below the black line (only where data exists) like:

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Philippe Corner 2020-12-3

编辑：Philippe Corner 2020-12-3

Hi Star Strider, thanks for your help. I edited de question to clarify what I'm trying to do

Philippe Corner 2020-12-6

Hi Star Strider.. any idea about how to solve? if you are thinking on anything i'm sure it would be helpfull

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KSSV 2020-12-4

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https://ww2.mathworks.cn/matlabcentral/answers/676633-how-to-plot-a-surf-plot-without-data-extrapoation#answer_564788

You have the black line in hand.. make a closed polygon out of it and get the indices of the points lying inside and outside using inpolygon. From the data matrix, make the points lying outside NaN.

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Philippe Corner 2020-12-10

I solved it with you advice. Thanks KSSV

Philippe Corner 2021-8-8

编辑：Walter Roberson 2021-8-8

Hello KSSV, could you check this question? I think you may help me to find the best way to solve it.. https://it.mathworks.com/matlabcentral/answers/894752-how-to-assign-values-to-a-mesh-based-on-xyzc-points

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MATLAB Graphics 2-D and 3-D Plots Surfaces, Volumes, and Polygons Surface and Mesh Plots

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