orbital.algorithm.evolutionary
Class Gene.Float

java.lang.Object
  java.lang.Number
      orbital.algorithm.evolutionary.Gene.Number
          orbital.algorithm.evolutionary.Gene.Float

All Implemented Interfaces:

java.io.Serializable, Gene

Direct Known Subclasses:

Gene.BoundedFloat

Enclosing interface:

Gene

public static class Gene.Float
extends Gene.Number

Floating point gene data.

This implementation uses a floating-point Double as gene data.

Double.NaN, Double.NEGATIVE_INFINITY and Double.POSITIVE_INFINITY are immune to mutation and thus fixed points (apart from recombination).

Author:

André Platzer

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface orbital.algorithm.evolutionary.Gene

Gene.BitSet, Gene.BoundedFloat, Gene.BoundedInteger, Gene.Fixed, Gene.Float, Gene.Integer, Gene.List, Gene.Number

Constructor Summary

Gene.Float()
Construct a non-initialized Float.

Gene.Float(double data)

Method Summary

java.lang.Object	clone() Returns a clone of this gene.
double	doubleValue()
java.lang.Object	get() Get the gene interpretation value.
Gene[]	recombine(Gene[] parents, int childrenCount, double recombinationProbability) Genetically recombine gene data of parents to their children via reproduction.
void	set(double n)
void	set(java.lang.Object n) Set the gene value.

Methods inherited from class orbital.algorithm.evolutionary.Gene.Number

distanceMeasure, equals, floatValue, hashCode, intValue, inverse, longValue, mutate, toString

Methods inherited from class java.lang.Number

byteValue, shortValue

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Gene.Float

public Gene.Float(double data)

Gene.Float

public Gene.Float()

Construct a non-initialized Float.

Note: non-initialized (that is Double.NaN) Floats are immune to mutation which is no good starting-point for creating a population.

Method Detail

clone

public java.lang.Object clone()

Description copied from interface: Gene

Returns a clone of this gene.

Specified by:

clone in interface Gene

Specified by:

clone in class Gene.Number

get

public java.lang.Object get()

Description copied from interface: Gene

Get the gene interpretation value.

Useful for interpreting a gene for fitness evaluation and interpretation of solutions.

Returns:

the Object represented by this gene. Interprets gene by decoding its data.

doubleValue

public double doubleValue()

Specified by:

doubleValue in class java.lang.Number

set

public void set(java.lang.Object n)

Description copied from interface: Gene

Set the gene value.

Consider setting fitness to Double.NaN due to the change to remind evaluator.

Parameters:

n - the Object this gene should represent. Encodes the value such that this gene represents the given object.

set

public void set(double n)

recombine

public Gene[] recombine(Gene[] parents,
                        int childrenCount,
                        double recombinationProbability)

Description copied from interface: Gene

Genetically recombine gene data of parents to their children via reproduction.

 a       a  = direct ancestors to be used
 n * --- ;    n  = number of children to be produced
 p       p  = probability for each part of parent's Gene to be inherited
 a/p = elongation of Gene length
 n/a = growth of population size
 if n/a < 1 the population is contracting.
 if n/a = 1 the population size is fixed.
 if n/a > 1 the population is growing.
 

Usually it is p=n/a.

Parameters:

parents - the Genes to be used as parents for the children. a is the number of parents (direct ancestors). parents are readonly.

childrenCount - the number of Gene children to produce and return. n is the number of children to be produced.

recombinationProbability - the probability with that parts of the inherited gene data is recombined. This does not necessarily imply an exchange of data, Genes might as well realign or repair at random. But it makes a data recombination possible.

Returns:

the new childrenCount children produced.