Evocosm - A C++ Framework for Evolutionary Computing

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Created by Scott Robert Ladd at Coyote Gulch Productions.


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libevocosm::scaler< OrganismType > Class Template Reference

Fitness scaling for a population. More...

#include <scaler.h>

Inheritance diagram for libevocosm::scaler< OrganismType >:
libevocosm::globals libevocosm::exponential_scaler< OrganismType > libevocosm::linear_norm_scaler< OrganismType > libevocosm::null_scaler< OrganismType > libevocosm::quadratic_scaler< OrganismType > libevocosm::sigma_scaler< OrganismType > libevocosm::windowed_scaler< OrganismType >

List of all members.

Public Member Functions


Detailed Description

template<class OrganismType>
class libevocosm::scaler< OrganismType >

As a population converges on a definitive solution, the difference between fitness values may become very small. That prevents the best solutions from having a significant advantage in reproduction. Fitness scaling solves this problem by adjusting the fitness values to the advantage of the most-fit chromosomes.

Parameters:
OrganismType- The type of organism

Constructor & Destructor Documentation

template<class OrganismType>
virtual libevocosm::scaler< OrganismType >::~scaler ( ) [inline, virtual]

A virtual destructor. By default, it does nothing; this is a placeholder that identifies this class as a potential base, ensuring that objects of a derived class will have their destructors called if they are destroyed through a base-class pointer.


Member Function Documentation

template<class OrganismType>
virtual void libevocosm::scaler< OrganismType >::scale_fitness ( vector< OrganismType > &  a_population) [pure virtual]

The scale_fitness method can adjust the fitness of a population to make it more likely that the "best" (whatever that menas) organisms have the best chance of reproduction.

Parameters:
a_population- A population of organisms

Implemented in libevocosm::null_scaler< OrganismType >, libevocosm::linear_norm_scaler< OrganismType >, libevocosm::windowed_scaler< OrganismType >, libevocosm::exponential_scaler< OrganismType >, libevocosm::quadratic_scaler< OrganismType >, libevocosm::sigma_scaler< OrganismType >, and libevocosm::linear_norm_scaler< function_solution >.


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

© 2011 Scott Robert Ladd. All rights reserved.
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