#ifndef MLPP_STAT_H
#define MLPP_STAT_H

//
//  Stat.hpp
//
//  Created by Marc Melikyan on 9/29/20.
//

#include <vector>


class Stat {
public:
	// These functions are for univariate lin reg module- not for users.
	double b0Estimation(const std::vector<double> &x, const std::vector<double> &y);
	double b1Estimation(const std::vector<double> &x, const std::vector<double> &y);

	// Statistical Functions
	double mean(const std::vector<double> &x);
	double median(std::vector<double> x);
	std::vector<double> mode(const std::vector<double> &x);
	double range(const std::vector<double> &x);
	double midrange(const std::vector<double> &x);
	double absAvgDeviation(const std::vector<double> &x);
	double standardDeviation(const std::vector<double> &x);
	double variance(const std::vector<double> &x);
	double covariance(const std::vector<double> &x, const std::vector<double> &y);
	double correlation(const std::vector<double> &x, const std::vector<double> &y);
	double R2(const std::vector<double> &x, const std::vector<double> &y);
	double chebyshevIneq(const double k);

	// Extras
	double weightedMean(const std::vector<double> &x, const std::vector<double> &weights);
	double geometricMean(const std::vector<double> &x);
	double harmonicMean(const std::vector<double> &x);
	double RMS(const std::vector<double> &x);
	double powerMean(const std::vector<double> &x, const double p);
	double lehmerMean(const std::vector<double> &x, const double p);
	double weightedLehmerMean(const std::vector<double> &x, const std::vector<double> &weights, const double p);
	double contraHarmonicMean(const std::vector<double> &x);
	double heronianMean(const double A, const double B);
	double heinzMean(const double A, const double B, const double x);
	double neumanSandorMean(const double a, const double b);
	double stolarskyMean(const double x, const double y, const double p);
	double identricMean(const double x, const double y);
	double logMean(const double x, const double y);
};


#endif /* Stat_hpp */