| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| // MARKER(update_precomp.py): autogen include statement, do not remove |
| #include "precompiled_chart2.hxx" |
| #include "MeanValueRegressionCurveCalculator.hxx" |
| #include "macros.hxx" |
| |
| #include <rtl/math.hxx> |
| #include <rtl/ustrbuf.hxx> |
| |
| using namespace ::com::sun::star; |
| |
| using ::rtl::OUString; |
| using ::rtl::OUStringBuffer; |
| |
| namespace chart |
| { |
| |
| MeanValueRegressionCurveCalculator::MeanValueRegressionCurveCalculator() : |
| m_fMeanValue( 0.0 ) |
| { |
| ::rtl::math::setNan( & m_fMeanValue ); |
| } |
| |
| MeanValueRegressionCurveCalculator::~MeanValueRegressionCurveCalculator() |
| {} |
| |
| // ____ XRegressionCurveCalculator ____ |
| void SAL_CALL MeanValueRegressionCurveCalculator::recalculateRegression( |
| const uno::Sequence< double >& /*aXValues*/, |
| const uno::Sequence< double >& aYValues ) |
| throw (uno::RuntimeException) |
| { |
| const sal_Int32 nDataLength = aYValues.getLength(); |
| sal_Int32 nMax = nDataLength; |
| double fSumY = 0.0; |
| const double * pY = aYValues.getConstArray(); |
| |
| for( sal_Int32 i = 0; i < nDataLength; ++i ) |
| { |
| if( ::rtl::math::isNan( pY[i] ) || |
| ::rtl::math::isInf( pY[i] )) |
| --nMax; |
| else |
| fSumY += pY[i]; |
| } |
| |
| m_fCorrelationCoeffitient = 0.0; |
| |
| if( nMax == 0 ) |
| { |
| ::rtl::math::setNan( & m_fMeanValue ); |
| } |
| else |
| { |
| m_fMeanValue = fSumY / static_cast< double >( nMax ); |
| |
| // correlation coefficient: standard deviation |
| if( nMax > 1 ) |
| { |
| double fErrorSum = 0.0; |
| for( sal_Int32 i = 0; i < nDataLength; ++i ) |
| { |
| if( !::rtl::math::isNan( pY[i] ) && |
| !::rtl::math::isInf( pY[i] )) |
| { |
| double v = m_fMeanValue - pY[i]; |
| fErrorSum += (v*v); |
| } |
| } |
| OSL_ASSERT( fErrorSum >= 0.0 ); |
| m_fCorrelationCoeffitient = sqrt( fErrorSum / (nMax - 1 )); |
| } |
| } |
| } |
| |
| double SAL_CALL MeanValueRegressionCurveCalculator::getCurveValue( double /*x*/ ) |
| throw (lang::IllegalArgumentException, |
| uno::RuntimeException) |
| { |
| return m_fMeanValue; |
| } |
| |
| |
| uno::Sequence< geometry::RealPoint2D > SAL_CALL MeanValueRegressionCurveCalculator::getCurveValues( |
| double min, double max, ::sal_Int32 nPointCount, |
| const uno::Reference< chart2::XScaling >& xScalingX, |
| const uno::Reference< chart2::XScaling >& xScalingY, |
| ::sal_Bool bMaySkipPointsInCalculation ) |
| throw (lang::IllegalArgumentException, |
| uno::RuntimeException) |
| { |
| if( bMaySkipPointsInCalculation ) |
| { |
| // optimize result |
| uno::Sequence< geometry::RealPoint2D > aResult( 2 ); |
| aResult[0].X = min; |
| aResult[0].Y = m_fMeanValue; |
| aResult[1].X = max; |
| aResult[1].Y = m_fMeanValue; |
| |
| return aResult; |
| } |
| return RegressionCurveCalculator::getCurveValues( min, max, nPointCount, xScalingX, xScalingY, bMaySkipPointsInCalculation ); |
| } |
| |
| OUString MeanValueRegressionCurveCalculator::ImplGetRepresentation( |
| const uno::Reference< util::XNumberFormatter >& xNumFormatter, |
| ::sal_Int32 nNumberFormatKey ) const |
| { |
| OUStringBuffer aBuf( C2U( "f(x) = " )); |
| |
| aBuf.append( getFormattedString( xNumFormatter, nNumberFormatKey, m_fMeanValue )); |
| |
| return aBuf.makeStringAndClear(); |
| } |
| |
| } // namespace chart |