
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 2D 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 2d fft of a matrix, one has to compute fft(fft(X)')'
