fftn

N-Dimensions fast Fourier transform.

Syntax

  • Y = fftn(X)

  • Y = fftn(X, sz)

Input argument

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

  • sz - a multidimensional array

Output argument

  • Y - a vector, matrix, N-D array: frequency domain representation.

Description

Y = fftn(X, sz) pads X with zeros, or truncates X, to create a multidimensional array of size sz before performing the transform.

The size of the result Y is sz.

Y = fftn(X) performs the N-dimensional fast Fourier transform.

The result Y is the same size as X.

Example

f = zeros(5, 5);
f(1:5,4:5) = 1;
Y = ifftn(fftn(f));

See also

ifftn, fft.

History

Author

Allan CORNET

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