<< fftn

FFTW

fftw >>

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fftshift

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Shift the zero-frequency component to the center of the spectrum.

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Syntax

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Y = fftshift(X)

Y = fftshift(X, DIM)

Input argument

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X

a vector, matrix or N-D array (double, single, integer).

DIM

axes over which to shift.

Output argument

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Y

shifted array.

Description

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fftshift(X) shift the zero-frequency component to the center of the spectrum.

Example

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M = [ 0.,  10.,  20.; 30.,  40., -40.; -30., -20., -10.]
fftshift(M)
fftshift(M, 1)

See also

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fft, ifftshift.

History

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Version	Description
1.0.0	initial version

Author

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Allan CORNET