fftn

N-dimensional Fast Fourier Transform.

Syntax

Y = fftn(X)
Y = fftn(X, siz)

Description

Returns the N-dimensional DFT of X. With siz (a vector of sizes), pads/truncates X to that shape first. Generalizes fft and fft2 to arbitrary dimensions.

Example

Y = fftn(rand(4,4,4))

See also

• fft — 1D Fast Fourier Transform.
• fft2 — 2D Fast Fourier Transform.