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+## 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:  retval = rectangle_lw (n, b)
+##
+## Rectangular lag window. Subfunction used for spectral density
+## estimation.
+  
+## Author:  FL <Friedrich.Leisch@ci.tuwien.ac.at>
+## Description:  Rectangular lag window
+
+function retval = rectangle_lw (n, b)
+  
+  retval = zeros (n, 1);
+  t = floor (1 / b);
+  
+  retval (1:t, 1) = ones (t, 1);
+
+endfunction