Normalizer

java.lang.Object

org.opt4j.optimizer.ea.Normalizer

All Implemented Interfaces:: IndividualStateListener

public class Normalizer extends Object implements IndividualStateListener

The Normalizer can be used to normalize Objectives.

Constructor Summary

Constructors

Constructor

Description

Normalizer()
Method Summary

Modifier and Type

Method

Description

void

inidividualStateChanged(Individual individual)

Invoked if the Individual changes its state.

Objectives

normalize(Objectives objectives)

Returns normalized objectives.

static final double

toMinProblem(Objective objective, Value<?> value)

Transforms the the Objective to a minimization objective, i.e.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- Normalizer
  
  public Normalizer()
Method Details
- normalize
  
  public Objectives normalize(Objectives objectives)
  
  Returns normalized objectives. Each objective is in the range between 0 and 1 and has to be minimized. Here, 0 is the smallest value seen so far for this objective for all evaluated Individuals and 1 the biggest value, respectively. If an objective is infeasible, it is set to 1.
  
  Parameters:
  
  objectives - the objectives to normalize
  
  Returns:
  
  the normalized objectives
- inidividualStateChanged
  
  public void inidividualStateChanged(Individual individual)
  
  Description copied from interface: IndividualStateListener
  
  Invoked if the Individual changes its state.
  
  Specified by:
  
  inidividualStateChanged in interface IndividualStateListener
  
  Parameters:
  
  individual - the individual that changes the state
- toMinProblem
  
  public static final double toMinProblem(Objective objective, Value<?> value)
  
  Transforms the the Objective to a minimization objective, i.e. if the given objective is to be maximized, the negation of the given value is returned.
  
  Parameters:
  
  objective - the respective objective
  
  value - the value to transform
  
  Returns:
  
  the corresponding double value