COMMENT

2 files changed, 310 insertions, 0 deletions

diff --git a/chart2/source/inc/LogarithmicRegressionCurveCalculator.hxx b/chart2/source/inc/LogarithmicRegressionCurveCalculator.hxx
new file mode 100644
index 000000000000..affe2feb6e1a
--- /dev/null
+++ b/chart2/source/inc/LogarithmicRegressionCurveCalculator.hxx
@@ -0,0 +1,106 @@
+/*************************************************************************
+ *
+ *  $RCSfile: LogarithmicRegressionCurveCalculator.hxx,v $
+ *
+ *  $Revision: 1.1 $
+ *
+ *  last change: $Author: bm $ $Date: 2003-12-17 14:36:36 $
+ *
+ *  The Contents of this file are made available subject to the terms of
+ *  either of the following licenses
+ *
+ *         - GNU Lesser General Public License Version 2.1
+ *         - Sun Industry Standards Source License Version 1.1
+ *
+ *  Sun Microsystems Inc., October, 2000
+ *
+ *  GNU Lesser General Public License Version 2.1
+ *  =============================================
+ *  Copyright 2000 by Sun Microsystems, Inc.
+ *  901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  This library 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 for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *
+ *  Sun Industry Standards Source License Version 1.1
+ *  =================================================
+ *  The contents of this file are subject to the Sun Industry Standards
+ *  Source License Version 1.1 (the "License"); You may not use this file
+ *  except in compliance with the License. You may obtain a copy of the
+ *  License at http://www.openoffice.org/license.html.
+ *
+ *  Software provided under this License is provided on an "AS IS" basis,
+ *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ *  See the License for the specific provisions governing your rights and
+ *  obligations concerning the Software.
+ *
+ *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ *  Copyright: 2003 by Sun Microsystems, Inc.
+ *
+ *  All Rights Reserved.
+ *
+ *  Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+#ifndef CHART2_LOGARITHMICREGRESSIONCURVECALCULATOR_HXX
+#define CHART2_LOGARITHMICREGRESSIONCURVECALCULATOR_HXX
+
+#ifndef _CPPUHELPER_IMPLBASE1_HXX_
+#include <cppuhelper/implbase1.hxx>
+#endif
+
+#ifndef _DRAFTS_COM_SUN_STAR_CHART2_XREGRESSIONCURVECALCULATOR_HPP_
+#include <drafts/com/sun/star/chart2/XRegressionCurveCalculator.hpp>
+#endif
+
+namespace chart
+{
+
+class LogarithmicRegressionCurveCalculator : public
+    ::cppu::WeakImplHelper1< ::drafts::com::sun::star::chart2::XRegressionCurveCalculator >
+{
+public:
+    LogarithmicRegressionCurveCalculator();
+    virtual ~LogarithmicRegressionCurveCalculator();
+
+protected:
+    // ____ 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 double SAL_CALL getCorrelationCoefficient()
+        throw (::com::sun::star::uno::RuntimeException);
+    virtual ::rtl::OUString SAL_CALL getRepresentation()
+        throw (::com::sun::star::uno::RuntimeException);
+
+private:
+    // formula is: f(x) = m_fSlope * log( x ) + m_fIntercept
+    double m_fSlope;
+    double m_fIntercept;
+    double m_fCorrelationCoeffitient;
+};
+
+} //  namespace chart
+
+// CHART2_LOGARITHMICREGRESSIONCURVECALCULATOR_HXX
+#endif
diff --git a/chart2/source/tools/LogarithmicRegressionCurveCalculator.cxx b/chart2/source/tools/LogarithmicRegressionCurveCalculator.cxx
new file mode 100644
index 000000000000..58f07cda1629
--- /dev/null
+++ b/chart2/source/tools/LogarithmicRegressionCurveCalculator.cxx
@@ -0,0 +1,204 @@
+/*************************************************************************
+ *
+ *  $RCSfile: LogarithmicRegressionCurveCalculator.cxx,v $
+ *
+ *  $Revision: 1.1 $
+ *
+ *  last change: $Author: bm $ $Date: 2003-12-17 14:38:29 $
+ *
+ *  The Contents of this file are made available subject to the terms of
+ *  either of the following licenses
+ *
+ *         - GNU Lesser General Public License Version 2.1
+ *         - Sun Industry Standards Source License Version 1.1
+ *
+ *  Sun Microsystems Inc., October, 2000
+ *
+ *  GNU Lesser General Public License Version 2.1
+ *  =============================================
+ *  Copyright 2000 by Sun Microsystems, Inc.
+ *  901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  This library 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 for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *
+ *  Sun Industry Standards Source License Version 1.1
+ *  =================================================
+ *  The contents of this file are subject to the Sun Industry Standards
+ *  Source License Version 1.1 (the "License"); You may not use this file
+ *  except in compliance with the License. You may obtain a copy of the
+ *  License at http://www.openoffice.org/license.html.
+ *
+ *  Software provided under this License is provided on an "AS IS" basis,
+ *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ *  See the License for the specific provisions governing your rights and
+ *  obligations concerning the Software.
+ *
+ *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ *  Copyright: 2003 by Sun Microsystems, Inc.
+ *
+ *  All Rights Reserved.
+ *
+ *  Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+#include "LogarithmicRegressionCurveCalculator.hxx"
+#include "macros.hxx"
+#include "RegressionCalculationHelper.hxx"
+
+#ifndef INCLUDED_RTL_MATH_HXX
+#include <rtl/math.hxx>
+#endif
+#ifndef _RTL_USTRBUF_HXX_
+#include <rtl/ustrbuf.hxx>
+#endif
+
+using namespace ::com::sun::star;
+using namespace ::drafts::com::sun::star;
+
+using ::rtl::OUString;
+using ::rtl::OUStringBuffer;
+
+namespace chart
+{
+
+LogarithmicRegressionCurveCalculator::LogarithmicRegressionCurveCalculator() :
+        m_fSlope( 0.0 ),
+        m_fIntercept( 0.0 ),
+        m_fCorrelationCoeffitient( 0.0 )
+{
+    ::rtl::math::setNan( & m_fSlope );
+    ::rtl::math::setNan( & m_fIntercept );
+    ::rtl::math::setNan( & m_fCorrelationCoeffitient );
+}
+
+LogarithmicRegressionCurveCalculator::~LogarithmicRegressionCurveCalculator()
+{}
+
+// ____ XRegressionCurve ____
+void SAL_CALL LogarithmicRegressionCurveCalculator::recalculateRegression(
+    const uno::Sequence< double >& aXValues,
+    const uno::Sequence< double >& aYValues )
+    throw (uno::RuntimeException)
+{
+    RegressionCalculationHelper::tDoubleVectorPair aValues(
+        RegressionCalculationHelper::cleanup(
+            aXValues, aYValues,
+            RegressionCalculationHelper::isValidAndXPositive()));
+
+    const size_t nMax = aValues.first.size();
+    if( nMax == 0 )
+    {
+        ::rtl::math::setNan( & m_fSlope );
+        ::rtl::math::setNan( & m_fIntercept );
+        ::rtl::math::setNan( & m_fCorrelationCoeffitient );
+        return;
+    }
+
+    double fAverageX = 0.0, fAverageY = 0.0;
+    for( size_t i = 0; i < nMax; ++i )
+    {
+        fAverageX += log( aValues.first[i] );
+        fAverageY += aValues.second[i];
+    }
+
+    const double fN = static_cast< double >( nMax );
+    fAverageX /= fN;
+    fAverageY /= fN;
+
+    double fQx = 0.0, fQy = 0.0, fQxy = 0.0;
+    for( i = 0; i < nMax; ++i )
+    {
+        double fDeltaX = log( aValues.first[i] ) - fAverageX;
+        double fDeltaY = aValues.second[i] - fAverageY;
+
+        fQx  += fDeltaX * fDeltaX;
+        fQy  += fDeltaY * fDeltaY;
+        fQxy += fDeltaX * fDeltaY;
+    }
+
+    m_fSlope = fQxy / fQx;
+    m_fIntercept = fAverageY - m_fSlope * fAverageX;
+    m_fCorrelationCoeffitient = fQxy / sqrt( fQx * fQy );
+}
+
+double SAL_CALL LogarithmicRegressionCurveCalculator::getCurveValue( double x )
+    throw (lang::IllegalArgumentException,
+           uno::RuntimeException)
+{
+    double fResult;
+    ::rtl::math::setNan( & fResult );
+
+    if( ! ( ::rtl::math::isNan( m_fSlope ) ||
+            ::rtl::math::isNan( m_fIntercept )))
+    {
+        fResult = m_fSlope * log( x ) + m_fIntercept;
+    }
+
+    return fResult;
+}
+
+double SAL_CALL LogarithmicRegressionCurveCalculator::getCorrelationCoefficient()
+    throw (uno::RuntimeException)
+{
+    return m_fCorrelationCoeffitient;
+}
+
+OUString SAL_CALL LogarithmicRegressionCurveCalculator::getRepresentation()
+    throw (uno::RuntimeException)
+{
+    OUStringBuffer aBuf( C2U( "f(x) = " ));
+
+    bool bHaveSlope = false;
+
+    if( m_fSlope != 0.0 )
+    {
+        aBuf.append( NUMBER_TO_STR( m_fSlope ));
+        aBuf.append( sal_Unicode( ' ' ));
+        aBuf.append( sal_Unicode( 0x00b7 ));
+        aBuf.append( sal_Unicode( ' ' ));
+        aBuf.appendAscii( RTL_CONSTASCII_STRINGPARAM( "log(x)" ));
+        bHaveSlope = true;
+    }
+
+    if( m_fIntercept != 0.0 )
+    {
+        if( ! bHaveSlope )
+        {
+            aBuf.append( NUMBER_TO_STR( m_fIntercept ));
+        }
+        else
+        {
+            if( m_fIntercept < 0.0 )
+            {
+                aBuf.appendAscii( RTL_CONSTASCII_STRINGPARAM( " - " ));
+                aBuf.append( NUMBER_TO_STR( fabs( m_fIntercept )));
+            }
+            else
+            {
+                aBuf.appendAscii( RTL_CONSTASCII_STRINGPARAM( " + " ));
+                aBuf.append( NUMBER_TO_STR( m_fIntercept ));
+            }
+        }
+    }
+
+    return aBuf.makeStringAndClear();
+}
+
+} //  namespace chart