/*

* This file is part of the GreasePad distribution (https://github.com/FraunhoferIOSB/GreasePad).

* Copyright (c) 2022-2023 Jochen Meidow, Fraunhofer IOSB

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <https://www.gnu.org/licenses/>.

*/

#ifndef QUANTILES_H

#define QUANTILES_H

#include "statistics.h"

//! Quantiles for recognition and snapping

namespace Quantiles {

//! Quantiles for snapping of end-points

struct Snapping

{

public:

//! Get quantile of standard normal distribution

double quantile_stdNormDistr() const { return quantile_snd_; }

//! Get quantile of chi-square distribution with two degeree of freedom

double quantile_chi2_1dof() const { return quantile_chi2_1_; }

void setAlpha( double alpha ); //!< Set significande level alpha

private:

double quantile_snd_{}; // Quantile of standard normal distribution N(0,1)

double quantile_chi2_1_{}; // Quantile of chi-squared distribution with 1 degree of freedom

const Stats::ChiSquared distr_chi2_1_{1};

const Stats::StandardNormal distr_snd_{};

};

//! Quantiles for reconition of geometric relations

struct Recognition

{

public:

//! Get quantile of chi-square distribution with one degeree of freedom

double quantile_chi2_1dof() const { return quantile_chi2_1dof_; }

//! Get quantile of chi-square distribution with two degeree of freedom

double quantile_chi2_2dof() const { return quantile_chi2_2dof_; }

void setAlpha( double alpha ); //!< Set significance level alpha

private:

double quantile_chi2_1dof_{};

double quantile_chi2_2dof_{};

const Stats::ChiSquared distr_chi2_1_{1};

const Stats::Exponential distr_Exp_0p5_{0.5};

};

} // namespace Quantiles

#endif // QUANTILES_H