vita::evaluator< T > Class Template Reference

Calculates the fitness of an individual. More...

#include <evaluator.h>

Inherits vita::cached_evaluator.

Inherited by vita::src_evaluator< T, dataframe >, vita::constrained_evaluator< T, E, P >, vita::evaluator_proxy< T, E >, vita::ga_evaluator< T, F >, vita::src_evaluator< T, DAT >, and vita::test_evaluator< T >.

Public Member Functions
virtual fitness_t	fast (const T &)
virtual std::unique_ptr< basic_lambda_f >	lambdify (const T &) const
virtual bool	load (std::istream &)
virtual fitness_t	operator() (const T &)=0
virtual bool	save (std::ostream &) const
Public Member Functions inherited from vita::cached_evaluator
virtual void	clear ()
	Clear possible cached values. More...

Detailed Description

template<class T>
class vita::evaluator< T >

Calculates the fitness of an individual.

Template Parameters

T	the type of individual used

evaluator class calculates the fitness of an individual (how good he is). This is an abstract class because the fitness is domain dependent (symbolic regression, data classification, automation...).

AKA fitness function.

Note

Our convention is to convert raw fitness to standardized fitness. The requirements for standardized fitness are:

• bigger values represent better choices;
• (useful but not mandatory) optimal value is 0.

Warning

This class shouldn't be confused with the vita::interpreter class (that calculates the output of an individual given an input vector).

Examples

example6.cc.

Definition at line 53 of file evaluator.h.

Member Function Documentation

operator()()

template<class T >

virtual fitness_t vita::evaluator< T >::operator() ( const T &  )

pure virtual

Returns

the fitness of the individual

Implemented in vita::constrained_evaluator< T, E, P >, vita::test_evaluator< T >, vita::evaluator_proxy< T, E >, vita::ga_evaluator< T, F >, vita::sum_of_errors_evaluator< T, ERRF, DAT >, vita::sum_of_errors_evaluator< T, count_error_functor< T > >, vita::sum_of_errors_evaluator< T, mae_error_functor< T > >, vita::sum_of_errors_evaluator< T, mse_error_functor< T > >, vita::sum_of_errors_evaluator< T, rmae_error_functor< T > >, vita::dyn_slot_evaluator< T >, vita::gaussian_evaluator< T >, and vita::binary_evaluator< T >.

Examples

example6.cc.

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

• evaluator.h