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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:  run_count (x, n)
+##
+## Counts the upward runs in the columns of x of length 1, 2, ... n-1
+## and >= n.
+
+## Author:  FL <Friedrich.Leisch@ci.tuwien.ac.at>
+## Description:  Count upward runs
+
+function retval = run_count (x, n)
+  
+  [xr, xc] = size(x);
+  
+  tmp = zeros (xr,xc);
+  retval = zeros (n, xc);
+  
+  for j = 1 : xc
+    run = 1;
+    count = 1;
+
+    for k = 2 : xr
+
+      if x(k, j) < x(k-1, j)
+	tmp(run, j) = count;
+	run = run + 1;
+	count = 0;
+      endif
+    
+      count = count + 1;
+
+    endfor
+
+    tmp(run, j) = count;
+  
+  endfor
+  
+  for k=1 : (n-1)
+    retval(k, :) = sum (tmp == k);
+  endfor
+  retval(n, :) = sum (tmp >= n);
+  
+endfunction