** Two-dimensional Fast Fourier Transform. **

** FFT2(X) returns the two-dimensional Fourier transform of matrix X. **

** If X is a vector, the result will have the same orientation. **

** FFT2(X,MROWS,NCOLS) pads matrix X with zeros to size MROWS-by-NCOLS **

** before transforming. **

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** See also IFFT2 , FFT , IFFT , FFTSHIFT . **

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