Genfun::LogisticFunction Class Reference

#include <LogisticFunction.hh>

Inheritance diagram for Genfun::LogisticFunction:

Public Member Functions
	LogisticFunction ()
	LogisticFunction (const LogisticFunction &right)
virtual	~LogisticFunction ()
virtual double	operator() (double argument) const override
virtual double	operator() (const Argument &arg) const override
Parameter &	x0 ()
const Parameter &	x0 () const
Parameter &	a ()
const Parameter &	a () const
Public Member Functions inherited from Genfun::AbsFunction
	AbsFunction ()
	AbsFunction (const AbsFunction &right)
virtual	~AbsFunction ()
virtual unsigned int	dimensionality () const
virtual double	operator() (double argument) const =0
virtual double	operator() (const Argument &argument) const =0
virtual AbsFunction *	clone () const =0
virtual FunctionComposition	operator() (const AbsFunction &f) const
virtual ParameterComposition	operator() (const AbsParameter &p) const
Derivative	derivative (const Variable &v) const
Derivative	prime () const
virtual bool	hasAnalyticDerivative () const
virtual Derivative	partial (unsigned int) const

Detailed Description

Author

Definition at line 20 of file LogisticFunction.hh.

Constructor & Destructor Documentation

LogisticFunction() [1/2]

Genfun::LogisticFunction::LogisticFunction

(

)

Definition at line 14 of file LogisticFunction.cc.

                                  :
  _x0("X0", 0.0,0.0,1.0),
  _a("A",2.0,1.0, 4.0)
{}

LogisticFunction() [2/2]

Genfun::LogisticFunction::LogisticFunction

(

const LogisticFunction &

right

)

Definition at line 22 of file LogisticFunction.cc.

                                                                :
AbsFunction(right),
_x0(right._x0),
_a(right._a)
{
}

~LogisticFunction()

Genfun::LogisticFunction::~LogisticFunction ( )

virtual

Definition at line 19 of file LogisticFunction.cc.

                                    {
}

Member Function Documentation

a() [1/2]

Parameter & Genfun::LogisticFunction::a

(

)

Definition at line 66 of file LogisticFunction.cc.

                                {
  return _a;
}

a() [2/2]

const Parameter & Genfun::LogisticFunction::a

(

)

const

Definition at line 74 of file LogisticFunction.cc.

                                            {
  return _a;
}

operator()() [1/2]

virtual double Genfun::LogisticFunction::operator() ( const Argument &  arg ) const

inlineoverridevirtual

Implements Genfun::AbsFunction.

Definition at line 37 of file LogisticFunction.hh.

{return operator() (arg[0]); }

operator()() [2/2]

double Genfun::LogisticFunction::operator() ( double  argument ) const

overridevirtual

Implements Genfun::AbsFunction.

Definition at line 29 of file LogisticFunction.cc.

                                                   {
  int i  = (int) (x+0.5), &back = i, end=back+1;
 
  if (i<0 || i>MAXRANGE) {
    return 0;
  }
  else {
    // Is the vector of values stale?
    if (__a!=_a.getValue() || __x0!=_x0.getValue()) {
 
      // Empty the vector
      fx.erase(fx.begin(),fx.end());
 
      // And update the cache.
      __a  = _a.getValue(); 
      __x0 = _x0.getValue();
      
    }
    
 
    if (fx.empty()) fx.push_back(__x0);
 
    while (fx.size()<size_t(end)) {
      double v = fx.back();
      fx.push_back(__a*v*(1.0-v));
    }
    
    return fx[i];
  }
 
  
}

Referenced by operator()().

x0() [1/2]

Parameter & Genfun::LogisticFunction::x0

(

)

Definition at line 62 of file LogisticFunction.cc.

                                 {
  return _x0;
}

x0() [2/2]

const Parameter & Genfun::LogisticFunction::x0

(

)

const

Definition at line 70 of file LogisticFunction.cc.

                                             {
  return _x0;
}

---

The documentation for this class was generated from the following files:

• LogisticFunction.hh
• LogisticFunction.cc