2-D FFT of a matrix

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2-D FFT of a matrix

Frederic Devernay-3
what should return fft() when called on a matrix?
octave returns the matrix formed by the ffts of the columns of the
matrix. Shouldn't it return the 2-D fft of the matrix instead?
after all, why does it return the fft of the colums and not of the
rows?

fred

P.S: to calculate the 2-d fft of a matrix, one has to compute fft(fft(X)')'