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Member of the transforms class.

Syntax

b = dftmtx(a)

Description

Computes the discrete Fourier transform matrix.

Examples

Inputs

Name	Description
a	Specifies the order of the matrix. a is a positive integer.

Outputs

Name	Description
b	Returns the discrete Fourier transform matrix. b is a complex matrix of values around the unit-circle whose inner product with a column vector of length a yields the discrete Fourier transform of the vector.

Examples

a = (1:5)';
f1 = fft(a);
f2 = dftmtx(length(a))*a

Related Topics

fft