Name
dft — discrete Fourier transform
Calling Sequence
[xf]=dft(x,flag);
Parameters
- x
input vector
- flag
indicates dft (flag=-1) or idft (flag=1)
- xf
output vector
Description
Function which computes dft of vector x.
Examples
n=8;omega = exp(-2*%pi*%i/n);
j=0:n-1;F=omega.^(j'*j); //Fourier matrix
x=1:8;x=x(:);
F*x
fft(x,-1)
dft(x,-1)
inv(F)*x
fft(x,1)
dft(x,1)