File: dft.man

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.TH dft 1 "April 1993" "Scilab Group" "Scilab Function"
.so ../sci.an
.SH NAME
dft - discrete Fourier transform
.SH CALLING SEQUENCE
.nf
[xf]=dft(x,flag);
.fi
.SH PARAMETERS
.TP 10
x
: input vector
.TP
flag
: indicates dft (flag=-1)  or idft (flag=1)
.TP
xf
: output vector
.SH DESCRIPTION
Function which computes dft of vector \fVx\fR.
.SH EXAMPLE
.nf
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)
.fi
.SH SEE ALSO
fft
.SH AUTHOR
C. B.