--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/statistics/base/center.m	Thu Oct 29 05:23:09 1998 +0000
@@ -0,0 +1,39 @@
+## Copyright (C) 1995, 1996, 1997  Kurt Hornik
+## 
+## 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:  center (x)
+##
+## If x is a vector, subtract its mean.
+## If x is a matrix, do the above for each column.
+
+## Author:  KH <Kurt.Hornik@ci.tuwien.ac.at>
+## Description:  Center by subtracting means
+  
+function retval = center (x)
+  
+  if (nargin != 1)
+    usage ("center (x)");
+  endif
+
+  if is_vector (x)
+    retval = x - mean(x);
+  elseif is_matrix (x)
+    retval = x - ones (rows (x), 1) * mean(x);
+  else
+    error ("center:  x must be a vector or a matrix.");
+  endif
+
+endfunction
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