1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 #ifndef CHART2_EXPONENTIALREGRESSIONCURVECALCULATOR_HXX 24 #define CHART2_EXPONENTIALREGRESSIONCURVECALCULATOR_HXX 25 26 #include "RegressionCurveCalculator.hxx" 27 28 namespace chart 29 { 30 31 class ExponentialRegressionCurveCalculator : 32 public RegressionCurveCalculator 33 { 34 public: 35 ExponentialRegressionCurveCalculator(); 36 virtual ~ExponentialRegressionCurveCalculator(); 37 38 protected: 39 virtual ::rtl::OUString ImplGetRepresentation( 40 const ::com::sun::star::uno::Reference< ::com::sun::star::util::XNumberFormatter >& xNumFormatter, 41 ::sal_Int32 nNumberFormatKey ) const; 42 43 private: 44 // ____ XRegressionCurveCalculator ____ 45 virtual void SAL_CALL recalculateRegression( 46 const ::com::sun::star::uno::Sequence< double >& aXValues, 47 const ::com::sun::star::uno::Sequence< double >& aYValues ); 48 virtual double SAL_CALL getCurveValue( double x ); 49 virtual ::com::sun::star::uno::Sequence< ::com::sun::star::geometry::RealPoint2D > SAL_CALL getCurveValues( 50 double min, 51 double max, 52 ::sal_Int32 nPointCount, 53 const ::com::sun::star::uno::Reference< ::com::sun::star::chart2::XScaling >& xScalingX, 54 const ::com::sun::star::uno::Reference< ::com::sun::star::chart2::XScaling >& xScalingY, 55 ::sal_Bool bMaySkipPointsInCalculation ); 56 57 // formula is: f(x) = exp(m_fLogIntercept) * exp( m_fLogSlope * x ) 58 // mathematical model f(x) = Intercept * Slope^x 59 double m_fLogSlope; 60 double m_fLogIntercept; 61 }; 62 63 } // namespace chart 64 65 // CHART2_EXPONENTIALREGRESSIONCURVECALCULATOR_HXX 66 #endif 67