Parallel Fourier in stripes on Matlab?

Question

Signal processing

Good day!
I ask for help on this issue:
There is an NxM matrix, you need to cut the matrix into strips on Matlab and calculate Fourier in strips along one of the directions. At the output, you need to get a large NxM matrix, consisting of the strips furred in this way.
Only you can’t use cycles, since matrices are healthy, you need to count a lot, and the performance with cycles is simply terrible.
Ready to reward the person whose answer helps!
Thanks in advance!

Answer 1

Indeed, fft can operate on a matrix as an input argument. It is unlikely that there will be something faster in matlab.

Answer 2

In format Y = fft(X,[],dim), the dim argument decides to cut to length or width.