--- a/scripts/statistics/base/statistics.m
+++ b/scripts/statistics/base/statistics.m
@@ -1,15 +1,15 @@
 ## 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. 
-## 
+## 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.
@@ -21,12 +21,12 @@
 ## columns of X as its rows.
 ##
 ## If X is a vector, treat it as a column vector.
-  
+
 ## Author:  KH <Kurt.Hornik@ci.tuwien.ac.at>
 ## Description:  Compute basic statistics
 
 function S = statistics (X)
-  
+
   if (nargin != 1)
     usage ("S = statistics (X)");
   endif
@@ -37,15 +37,15 @@
     endif
     for k=1:columns(X)
       S(:,k) = [(min (X(:,k)));
-		(empirical_inv ([0.25;0.5;0.75], X(:,k)));
-	 	(max (X(:,k)));
-		(mean (X(:,k)));
-		(std (X(:,k)));
-		(skewness (X(:,k)));
-		(kurtosis (X(:,k)))];
-    endfor 
+                (empirical_inv ([0.25;0.5;0.75], X(:,k)));
+                (max (X(:,k)));
+                (mean (X(:,k)));
+                (std (X(:,k)));
+                (skewness (X(:,k)));
+                (kurtosis (X(:,k)))];
+    endfor
   else
     error ("statistics:  invalid argument");
   endif
-  
+
 endfunction