File: dft.cat

package info (click to toggle)
scilab 2.6-4
  • links: PTS
  • area: non-free
  • in suites: woody
  • size: 54,632 kB
  • ctags: 40,267
  • sloc: ansic: 267,851; fortran: 166,549; sh: 10,005; makefile: 4,119; tcl: 1,070; cpp: 233; csh: 143; asm: 135; perl: 130; java: 39
file content (32 lines) | stat: -rw-r--r-- 569 bytes parent folder | download 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
dft              Scilab Group              Scilab Function              dft
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.
  
EXAMPLE
 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
  
AUTHOR
   C. B.