Interpolate 1 array to another

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Sarah Yun
Sarah Yun on 18 Jan 2020
Answered: Akira Agata on 19 Jan 2020
Hello,
I want to interpolate a 5x9000 numeric array onto a 2000x3000 numeric array.
Other words, I want both arrays the same size.
What code is easiest for this?

Answers (2)

Image Analyst
Image Analyst on 18 Jan 2020
If you have the Image Processsing Toolbox, use imresize():
array1NewSize = imresize(array1, size(array2));

Akira Agata
Akira Agata on 19 Jan 2020
If you don't have the Image Processing Toolbox, interp2 would be your friend, like:
% assuming array1 is a 5x9000 numeric array
[xGrid, yGrid] = meshgrid(linspace(0,1,9000),linspace(0,1,5));
[xGrid2, yGrid2] = meshgrid(linspace(0,1,3000),linspace(0,1,2000));
array1NewSize = interp2(xGrid,yGrid,array1,xGrid2,yGrid2);

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