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Alternative to interp2

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Magnate
Magnate on 22 Jun 2024
Commented: Magnate on 17 Jul 2024
I am trying to interpolate values in a 2d space. But my code is very slow.
I used the tic toc and found that it is because of interp2 being called multiple times. Is there an alternate for it ? that would be faster ?

Answers (2)

Ayush Modi
Ayush Modi on 22 Jun 2024
Edited: Ayush Modi on 10 Jul 2024
Hi,
"griddedInterpolant" function will run faster and is recommended by MathWorks as an alternative to calling "interp2" multiple times.
Refer to the following documentation for more information on "griddedInterpolant" function:
  1 Comment
Magnate
Magnate on 17 Jul 2024
Thanks Ayush, griddedInterpolant got the run time to the acceptable range.

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John D'Errico
John D'Errico on 22 Jun 2024
Perhaps you are calling interp2 multiple times in a loop, when a single call with multiple points will be far faster. This would be true also with griddedInterpolant. Both tools will be internally optimized to perform much better in a vectorized way.
  1 Comment
Magnate
Magnate on 17 Jul 2024
It is not inside a loop. but I will read about vectorized way. thanks.

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