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Aide Scilab >> Traitement du Signal > dft

dft

discrete Fourier transform

Calling Sequence

[xf]=dft(x,flag);

Arguments

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)

See Also

  • fft — Transformée de Fourier discrète rapide.

Authors

C. B.

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Last updated:
Wed Oct 05 12:10:56 CEST 2011