psychometricfunction.h

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// Copyright (c) 2012-2019 University of Lyon and CNRS (France).
// All rights reserved.
//
// This file is part of MEPP2; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 3 of
// the License, or (at your option) any later version.
//
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#pragma once
 
#include <cmath>
 
#include "genericparametricmodel.h"
 
//-----------------------------------------------------------------------------------
 
 
class WeibulPsychometricFunction
    : public GenericParametricModel< double, double, double >
{
 
  //-----------------------------------------------------------------------------------
 
public:
  WeibulPsychometricFunction()
      : GenericParametricModel< ParameterType, InputType, OutputType >()
  {
    default_params();
  }
 
  WeibulPsychometricFunction(const ParameterType &param)
      : GenericParametricModel< ParameterType, InputType, OutputType >(param)
  {
  }
 
  virtual ~WeibulPsychometricFunction() {}
 
  //-----------------------------------------------------------------------------------
 
public:
  virtual void compute(const InputType &in, OutputType &out) const
  {
    out = 1. - std::exp(-std::pow(in, m_param));
  }
 
  //-----------------------------------------------------------------------------------
 
protected:
  virtual void default_params() { m_param = 3.5; }
};