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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.
(-1) FFT or (1) inverse FFT
dimension vector which gives the number of values of
xfor each of its indices
output of multidimensional fft in same format as for
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)]
dim vector is:
mfft is superseeded by fft:
is equivalent to
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