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+/*
+    $Id$
+
+    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 <qvaluevector.h>
+#include "knumber.h"
+
+class KStats {
+
+public:
+	KStats();
+	~KStats();
+
+public:
+	void clearAll();
+	void enterData(const KNumber & data);
+	void clearLast();
+	KNumber sum();
+	KNumber sum_of_squares();
+	KNumber mean();
+	KNumber median();
+	KNumber std_kernel();
+	KNumber std();
+	KNumber sample_std();
+	int count() const;
+	bool     error();
+
+private:
+    QValueVector<KNumber> mData;
+    bool error_flag;
+
+};
+
+
+#endif /*KSTATS_H*/
+