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mfft(1) Scilab Function mfft(1)
NAME
mfft - multi-dimensional fft
CALLING SEQUENCE
[xk]=mfft(x,flag,dim)
PARAMETERS
x : x(i,j,k,...) input signal in the form of a row vector whose values
are arranged so that the i index runs the quickest, followed by the j
index, etc.
flag : (-1) FFT or (1) inverse FFT
dim : dimension vector which gives the number of values of x for each of
its indices
xk : output of multidimensional fft in same format as for x
DESCRIPTION
FFT for a multi-dimensional signal
For example for a three dimensional vector which has three points along its
first dimension, two points along its second dimension and three points
along its third dimension the row vector is arranged as follows
x=[x(1,1,1),x(2,1,1),x(3,1,1),
x(1,2,1),x(2,2,1),x(3,2,1),
x(1,1,2),x(2,1,2),x(3,1,2),
x(1,2,2),x(2,2,2),x(3,2,2),
x(1,1,3),x(2,1,3),x(3,1,3),
x(1,2,3),x(2,2,3),x(3,2,3)]
and the dim vector is: dim=[3,2,3]
AUTHOR
C. B.
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