Question
fft dim shows how dim parameter is used for multidimensional signals of ndims(X) = 2 When ndims(X) > 2 how is it used? (I cannot use fftn here.)
Expert Answer
Prashant Kumar
PhD Expert
Answered Aug 30, 2026
If you have a multidimensional array x, say
x = ones(3,4,5)
then
fft(x,[],3)
will perform FFT on the dimension with 5 elements, and so on.
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