--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/signal/periodogram.m	Fri Oct 23 05:44:01 1998 +0000
@@ -0,0 +1,41 @@
+## Copyright (C) 1995, 1996, 1997  Friedrich Leisch
+## 
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 2, or (at your option)
+## any later version.
+## 
+## This program is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+## General Public License for more details. 
+## 
+## You should have received a copy of the GNU General Public License
+## along with this file.  If not, write to the Free Software Foundation,
+## 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+## usage:  periodogram (x)
+##
+## For a data matrix x from a sample of size n, return the periodogram.
+  
+## Author: FL <Friedrich.Leisch@ci.tuwien.ac.at>
+## Description:  Compute the periodogram
+
+function retval = periodogram (x)
+
+  [r c] = size(x);
+
+  if (r == 1)
+    r = c;
+  endif
+  
+  retval = (abs (fft (x - mean (x)))) .^ 2 / r;
+  
+endfunction
+
+  
+
+
+
+
+