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Scilab help >> Signal Processing > transforms > dft

dft

離散フーリエ変換

呼び出し手順

[xf]=dft(x,flag);

パラメータ

x

入力ベクトル

flag

dft (flag=-1) または idft (flag=1)を指定

xf

出力ベクトル

説明

ベクトルxのDFTを計算する関数.

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)

参照

  • fft — 高速フーリエ変換
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Last updated:
Mon Oct 01 17:40:29 CEST 2012