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diff --git a/chart2/source/inc/LogarithmicRegressionCurveCalculator.hxx b/chart2/source/inc/LogarithmicRegressionCurveCalculator.hxx
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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2008 by Sun Microsystems, Inc.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * $RCSfile: LogarithmicRegressionCurveCalculator.hxx,v $
+ * $Revision: 1.5 $
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org 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 Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+#ifndef CHART2_LOGARITHMICREGRESSIONCURVECALCULATOR_HXX
+#define CHART2_LOGARITHMICREGRESSIONCURVECALCULATOR_HXX
+
+#include "RegressionCurveCalculator.hxx"
+
+namespace chart
+{
+
+class LogarithmicRegressionCurveCalculator :
+        public RegressionCurveCalculator
+{
+public:
+    LogarithmicRegressionCurveCalculator();
+    virtual ~LogarithmicRegressionCurveCalculator();
+
+protected:
+    virtual ::rtl::OUString ImplGetRepresentation(
+        const ::com::sun::star::uno::Reference< ::com::sun::star::util::XNumberFormatter >& xNumFormatter,
+        ::sal_Int32 nNumberFormatKey ) const;
+
+private:
+    // ____ XRegressionCurveCalculator ____
+    virtual void SAL_CALL recalculateRegression(
+        const ::com::sun::star::uno::Sequence< double >& aXValues,
+        const ::com::sun::star::uno::Sequence< double >& aYValues )
+        throw (::com::sun::star::uno::RuntimeException);
+    virtual double SAL_CALL getCurveValue( double x )
+        throw (::com::sun::star::lang::IllegalArgumentException,
+               ::com::sun::star::uno::RuntimeException);
+    virtual ::com::sun::star::uno::Sequence< ::com::sun::star::geometry::RealPoint2D > SAL_CALL getCurveValues(
+        double min,
+        double max,
+        ::sal_Int32 nPointCount,
+        const ::com::sun::star::uno::Reference< ::com::sun::star::chart2::XScaling >& xScalingX,
+        const ::com::sun::star::uno::Reference< ::com::sun::star::chart2::XScaling >& xScalingY,
+        ::sal_Bool bMaySkipPointsInCalculation )
+        throw (::com::sun::star::lang::IllegalArgumentException,
+               ::com::sun::star::uno::RuntimeException);
+
+    // formula is: f(x) = m_fSlope * log( x ) + m_fIntercept
+    double m_fSlope;
+    double m_fIntercept;
+};
+
+} //  namespace chart
+
+// CHART2_LOGARITHMICREGRESSIONCURVECALCULATOR_HXX
+#endif