How to interpolate a surface without changing the convexity

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I want to smooth my 3D data surface by interpolation. It looks like this
I tried with method 'cubic' and 'akima' but these methods chang the convexity. Any method to interpolate my data without introducing the peak and valley?
  1 Comment
Torsten
Torsten on 6 Sep 2022
Edited: Torsten on 6 Sep 2022
Why do you want to smoothe your surface ? In my opinion, it looks smooth enough - the isolines are very regular.
If you want to interpolate, use "interp2" on the original data.

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Answers (1)

vamshi sai yele
vamshi sai yele on 14 Sep 2022
As per my understanding you want smoothen a 3D figure without altering its behaviour.
I have tried from my side to find the solution and below are my findings. Hope you find them helpful.
To smoothen a 3-D figure, there is direct keyword ‘smooth3()’ which simply works as magic. Attached figure-1 shows a result without the keyword and figure – 2 shows after applying the smooth3() function.
Fig-1
Fig-2
The MATLAB code for the above experiment and other useful resources links have been attached below for your reference and for other techniques.
Hope you will find them helpful!

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