qwt_box_statistics.h

/******************************************************************************
 * Qwt Widget Library
 * Copyright (C) 1997   Josef Wilgen
 * Copyright (C) 2002   Uwe Rathmann
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the Qwt License, Version 1.0
 *
 * Modified by ChenZongYan in 2024 <czy.t@163.com>
 *****************************************************************************/
 
#ifndef QWT_BOX_STATISTICS_H
#define QWT_BOX_STATISTICS_H
 
#include "qwt_global.h"
#include "qwt_samples.h"
 
#include <qvector.h>
 
class QWT_EXPORT QwtBoxStatisticsCalculator
{
public:
    enum WhiskerMethod
    {
        Tukey,
        
        Percentile,
        
        MinMax,
        
        StandardDeviation,
        
        StandardError
    };
    
    QwtBoxStatisticsCalculator();
    
    void setWhiskerMethod(WhiskerMethod method);
    
    WhiskerMethod whiskerMethod() const;
    
    void setWhiskerCoefficient(double coeff);
    
    double whiskerCoefficient() const;
    
    static QwtBoxSample calculate(
        double position,
        const QVector<double>& sortedData,
        WhiskerMethod method = Tukey,
        double coefficient = 1.5);
    
    static QwtBoxSample calculateFromRaw(
        double position,
        const QVector<double>& rawData,
        WhiskerMethod method = Tukey,
        double coefficient = 1.5);
    
    static QVector<double> extractOutliers(
        const QwtBoxSample& sample,
        const QVector<double>& sortedData);
    
    static void calculateFull(
        double position,
        const QVector<double>& rawData,
        QwtBoxSample& sample,
        QwtBoxOutlierSample& outliers,
        WhiskerMethod method = Tukey,
        double coefficient = 1.5);
    
private:
    static double quantile(const QVector<double>& sorted, double p);
    
    static double median(const QVector<double>& sorted);
    
    static double iqr(const QVector<double>& sorted);
    
    static double mean(const QVector<double>& data);
    
    static double standardDeviation(const QVector<double>& data);
    
    static QVector<double> sortData(const QVector<double>& data);
    
    WhiskerMethod m_method;
    double m_coefficient;
};
 
#endif // QWT_BOX_STATISTICS_H