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 "qwtcore_global.h"
#include "qwt_samples.h"
 
#include <qvector.h>
 
class QWTCORE_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 { 1.5 };
};
 
#endif  // QWT_BOX_STATISTICS_H