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 truncatesX, to create a multidimensional array of sizesz 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

Version	📄 Description
1.0.0	initial version