chart2/source/tools/MovingAverageRegressionCurveCalculator.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include "MovingAverageRegressionCurveCalculator.hxx"
  21 #include "RegressionCalculationHelper.hxx"
  22 #include "ResId.hxx"
  23 #include "Strings.hrc"
  24 #include "macros.hxx"
  25
  26 #include <rtl/math.hxx>
  27 #include <rtl/ustrbuf.hxx>
  28
  29 using namespace ::com::sun::star;
  30
  31 namespace chart
  32 {
  33
  34 MovingAverageRegressionCurveCalculator::MovingAverageRegressionCurveCalculator()
  35 {}
  36
  37 MovingAverageRegressionCurveCalculator::~MovingAverageRegressionCurveCalculator()
  38 {}
  39
  40 // ____ XRegressionCurveCalculator ____
  41 void SAL_CALL MovingAverageRegressionCurveCalculator::recalculateRegression(
  42     const uno::Sequence< double >& aXValues,
  43     const uno::Sequence< double >& aYValues )
  44     throw (uno::RuntimeException, std::exception)
  45 {
  46     ::rtl::math::setNan( & m_fCorrelationCoeffitient );
  47
  48     RegressionCalculationHelper::tDoubleVectorPair aValues(
  49         RegressionCalculationHelper::cleanup(
  50             aXValues, aYValues,
  51             RegressionCalculationHelper::isValid()));
  52
  53     const size_t aSize = aValues.first.size();
  54
  55     aYList.clear();
  56     aXList.clear();
  57
  58     for( size_t i = mPeriod - 1; i < aSize; ++i )
  59     {
  60         double yAvg;
  61         yAvg = 0.0;
  62
  63         for (sal_Int32 j = 0; j < mPeriod; j++)
  64         {
  65             yAvg += aValues.second[i - j];
  66         }
  67         yAvg /= mPeriod;
  68
  69         double x = aValues.first[i];
  70         aYList.push_back(yAvg);
  71         aXList.push_back(x);
  72     }
  73 }
  74
  75 double SAL_CALL MovingAverageRegressionCurveCalculator::getCurveValue( double /*x*/ )
  76     throw (lang::IllegalArgumentException,
  77            uno::RuntimeException, std::exception)
  78 {
  79     double fResult;
  80     rtl::math::setNan(&fResult);
  81     return fResult;
  82 }
  83
  84 uno::Sequence< geometry::RealPoint2D > SAL_CALL MovingAverageRegressionCurveCalculator::getCurveValues(
  85     double /*min*/, double /*max*/, sal_Int32 /*nPointCount*/,
  86     const uno::Reference< chart2::XScaling >& /*xScalingX*/,
  87     const uno::Reference< chart2::XScaling >& /*xScalingY*/,
  88     sal_Bool /*bMaySkipPointsInCalculation*/ )
  89     throw (lang::IllegalArgumentException,
  90            uno::RuntimeException, std::exception)
  91 {
  92     uno::Sequence< geometry::RealPoint2D > aResult( aYList.size() );
  93
  94     for( size_t i = 0; i < aYList.size(); ++i )
  95     {
  96         aResult[i].X = aXList[i];
  97         aResult[i].Y = aYList[i];
  98     }
  99     return aResult;
 100 }
 101
 102 OUString MovingAverageRegressionCurveCalculator::ImplGetRepresentation(
 103     const uno::Reference< util::XNumberFormatter >& /*xNumFormatter*/,
 104     ::sal_Int32 /*nNumberFormatKey*/ ) const
 105 {
 106     OUStringBuffer aBuf( "f(x) = N/A");
 107
 108     aBuf = SCH_RESSTR( STR_OBJECT_MOVING_AVERAGE_WITH_PARAMETERS );
 109
 110     return aBuf.makeStringAndClear();
 111 }
 112
 113 } //  namespace chart
 114
 115 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */