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diff --git a/kspread/plugins/calculator/stats.h b/kspread/plugins/calculator/stats.h
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+++ b/kspread/plugins/calculator/stats.h
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+/*
+    $Id: stats.h 466447 2005-10-02 17:54:10Z zander $
+
+    KCalc, a scientific calculator for the X window system using the
+    Qt widget libraries, available at no cost at http://www.troll.no
+
+    Copyright (C) 1996 Bernd Johannes Wuebben
+                       wuebben@math.cornell.edu
+
+    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 of the License, 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 program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+
+*/
+
+#ifndef KSTATS_H
+#define KSTATS_H
+
+#include <qptrlist.h>
+#include <math.h>
+#include "kcalctype.h"
+
+class KStats
+{
+
+public:
+
+    KStats();
+    ~KStats();
+
+public:
+
+    void clearAll();
+    void enterData(CALCAMNT data);
+    void clearLast();
+    CALCAMNT min();
+    CALCAMNT max();
+    CALCAMNT sum();
+    CALCAMNT mul();
+    CALCAMNT sum_of_squares();
+    CALCAMNT mean();
+    CALCAMNT median();
+    CALCAMNT std_kernel();
+    CALCAMNT std();
+    CALCAMNT sample_std();
+    int	     count();
+    bool     error();
+
+private:
+
+    QPtrList<CALCAMNT> data;
+    bool error_flag;
+
+};
+
+class MyList : public  QPtrList<CALCAMNT>
+{
+
+public:
+
+  MyList() : QPtrList<CALCAMNT>() {};
+
+protected:
+  int compareItems(Item item1,Item item2);
+};
+
+
+#endif /*KSTATS_H*/
+