ExponentialRegressionCurveCalculator.hxx

Go to the documentation of this file.

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   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 .
 */
#pragma once
 
#include "RegressionCurveCalculator.hxx"
 
namespace chart
{
 
class ExponentialRegressionCurveCalculator final : public RegressionCurveCalculator
{
public:
    ExponentialRegressionCurveCalculator();
    virtual ~ExponentialRegressionCurveCalculator() override;
 
protected:
    virtual OUString ImplGetRepresentation(
        const css::uno::Reference<css::util::XNumberFormatter>& xNumFormatter,
        sal_Int32 nNumberFormatKey, sal_Int32* pFormulaLength = nullptr ) const override;
 
private:
    // ____ XRegressionCurveCalculator ____
    virtual void SAL_CALL recalculateRegression(
        const css::uno::Sequence<double>& aXValues,
        const css::uno::Sequence<double>& aYValues ) override;
 
    virtual double SAL_CALL getCurveValue( double x ) override;
 
    virtual css::uno::Sequence<css::geometry::RealPoint2D> SAL_CALL getCurveValues(
        double min,
        double max,
        sal_Int32 nPointCount,
        const css::uno::Reference<css::chart2::XScaling>& xScalingX,
        const css::uno::Reference<css::chart2::XScaling>& xScalingY,
        sal_Bool bMaySkipPointsInCalculation ) override;
 
    // formula is: f(x) = m_fSign * exp(m_fLogIntercept) * exp( m_fLogSlope * x )
    // mathematical model f(x) = Intercept * Slope^x
    double m_fLogSlope;
    double m_fLogIntercept;
    double m_fSign;
};
 
} //  namespace chart
 
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */