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FreeMat
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Section: Transforms/Decompositions
Computes the inverse DFT of an N-dimensional numerical array along all dimensions. The general syntax for its use is
y = ifftn(x)
which computes the same-size inverse FFTs for each dimension of x. Alternately, you can specify the size vector
y = ifftn(x,dims)
where dims is a vector of sizes. The array x is zero padded or truncated as necessary in each dimension so that the output is of size dims. The ifftn function is implemented by a sequence of calls to ifft.