FreeMat: IFFTSHIFT Inverse Shift FFT Output

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IFFTSHIFT Inverse Shift FFT Output

Section: Transforms/Decompositions

# Usage

The `ifftshift` function shifts the DC component (zero-frequency) of the output from the center of the array back to the first position and iseffectively the inverse of `fftshift`. For vectors this means swapping the two halves of the vector. For matrices, the first and third quadrants are swapped. So on for N-dimensional arrays. The syntax for its use is

         y = ifftshift(x).

Alternately, you can specify that only one dimension be shifted

         y = ifftshift(x,dim).