Alternative to interp2

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Magnate
Magnate 2024-6-22
评论： Magnate 2024-7-17
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 ?

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回答（2 个）

Ayush Modi
Ayush Modi 2024-6-22
编辑：Ayush Modi 2024-7-10
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:
https://www.mathworks.com/help/matlab/ref/griddedinterpolant.html#bvh2f0p-2:~:text=Grid%20Vectors-,Tips,-It%20is%20quicker
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Magnate
Magnate 2024-7-17
Thanks Ayush, griddedInterpolant got the run time to the acceptable range.

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John D'Errico
John D'Errico 2024-6-22
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.
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Magnate
Magnate 2024-7-17
It is not inside a loop. but I will read about vectorized way. thanks.

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