Module io.jenetics.base

Package io.jenetics

Class DoubleChromosome

java.lang.Object

io.jenetics.AbstractChromosome<DoubleGene>

io.jenetics.DoubleChromosome

All Implemented Interfaces:

BoundedChromosome<Double,DoubleGene>, Chromosome<DoubleGene>, NumericChromosome<Double,DoubleGene>, BaseSeq<DoubleGene>, Factory<Chromosome<DoubleGene>>, Verifiable, Serializable, Iterable<DoubleGene>, RandomAccess

public class DoubleChromosome
extends AbstractChromosome<DoubleGene>
implements NumericChromosome<Double,DoubleGene>, Serializable

Numeric chromosome implementation which holds 64-bit floating point numbers.

Since:

1.6

Version:

6.1

See Also:

• DoubleGene
• Serialized Form

Implementation Note:

This class is immutable and thread-safe.

Field Summary

Fields inherited from class io.jenetics.AbstractChromosome

_genes, _valid

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	DoubleChromosome(ISeq<DoubleGene> genes, IntRange lengthRange)	Create a new chromosome from the given genes and the allowed length range of the chromosome.

Method Summary

Modifier and Type	Method	Description
DoubleStream	doubleStream()	Returns a sequential stream of the alleles with this chromosome as its source.
boolean	equals(Object obj)
int	hashCode()
IntRange	lengthRange()	Return the allowed length range of the chromosome.
DoubleChromosome	map(Function<? super double[],double[]> f)	Maps the gene alleles of this chromosome, given as double[] array, by applying the given mapper function f.
Double	max()	Return the maximum value of this BoundedChromosome.
Double	min()	Return the minimum value of this BoundedChromosome.
DoubleChromosome	newInstance()	Create a new instance of type T.
DoubleChromosome	newInstance(ISeq<DoubleGene> genes)	A factory method which creates a new Chromosome of specific type and the given genes.
static DoubleChromosome	of(double min, double max)	Create a new random DoubleChromosome of length one.
static DoubleChromosome	of(double min, double max, int length)	Create a new random DoubleChromosome.
static DoubleChromosome	of(double min, double max, IntRange lengthRange)	Create a new random chromosome.
static DoubleChromosome	of(DoubleGene... genes)	Create a new DoubleChromosome with the given genes.
static DoubleChromosome	of(DoubleRange range)	Create a new random DoubleChromosome of length one.
static DoubleChromosome	of(DoubleRange range, int length)	Create a new random DoubleChromosome.
static DoubleChromosome	of(DoubleRange range, IntRange lengthRange)	Create a new random chromosome.
static DoubleChromosome	of(Iterable<DoubleGene> genes)	Create a new DoubleChromosome with the given genes.
double[]	toArray()	Returns a double array containing all the elements in this chromosome in a proper sequence.
double[]	toArray(double[] array)	Returns a double array containing all the elements in this chromosome in a proper sequence.

Methods inherited from class io.jenetics.AbstractChromosome

get, isValid, length, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.jenetics.util.BaseSeq

forEach, get, isEmpty, iterator, length, listIterator, nonEmpty, spliterator, stream

Methods inherited from interface io.jenetics.BoundedChromosome

max, min

Methods inherited from interface io.jenetics.Chromosome

as, gene, isValid

Methods inherited from interface io.jenetics.util.Factory

instances

Methods inherited from interface io.jenetics.NumericChromosome

byteValue, byteValue, doubleValue, doubleValue, floatValue, floatValue, intValue, intValue, longValue, longValue, shortValue, shortValue

Constructor Details

DoubleChromosome

protected DoubleChromosome(ISeq<DoubleGene> genes,
 IntRange lengthRange)

Create a new chromosome from the given genes and the allowed length range of the chromosome.

Parameters:

genes - the genes that form the chromosome.

lengthRange - the allowed length range of the chromosome

Throws:

NullPointerException - if one of the arguments is null.

IllegalArgumentException - if the length of the gene sequence is empty, doesn't match with the allowed length range, the minimum or maximum of the range is smaller or equal zero, or the given range size is zero.

Since:

4.0

Method Details

newInstance

public DoubleChromosome newInstance(ISeq<DoubleGene> genes)

Description copied from interface: Chromosome

A factory method which creates a new Chromosome of specific type and the given genes.

Specified by:

newInstance in interface Chromosome<DoubleGene>

Parameters:

genes - the genes of the new chromosome. The given genes array is not copied.

Returns:

A new Chromosome of the same type with the given genes.

newInstance

public DoubleChromosome newInstance()

Description copied from interface: Factory

Create a new instance of type T.

Specified by:

newInstance in interface Factory<Chromosome<DoubleGene>>

Returns:

a new instance of type T

map

public DoubleChromosome map(Function<? super double[],double[]> f)

Maps the gene alleles of this chromosome, given as double[] array, by applying the given mapper function f. The mapped gene values are then wrapped into a newly created chromosome.

final DoubleChromosome chromosome = ...;
final DoubleChromosome normalized = chromosome.map(Main::normalize);

static double[] normalize(final double[] values) {
    final double sum = sum(values);
    for (int i = 0; i < values.length; ++i) {
        values[i] /= sum;
    }
    return values;
}

Parameters:

f - the mapper function

Returns:

a newly created chromosome with the mapped gene values

Throws:

NullPointerException - if the mapper function is null.

IllegalArgumentException - if the length of the mapped double[] array is empty or doesn't match with the allowed length range

Since:

6.1

doubleStream

public DoubleStream doubleStream()

Returns a sequential stream of the alleles with this chromosome as its source.

Returns:

a sequential stream of alleles

Since:

4.3

toArray

public double[] toArray(double[] array)

Returns a double array containing all the elements in this chromosome in a proper sequence. If the chromosome fits in the specified array, it is returned therein. Otherwise, a new array is allocated with the length of this chromosome.

Parameters:

array - the array into which the elements of these chromosomes are to be stored, if it is big enough; otherwise, a new array is allocated for this purpose.

Returns:

an array containing the elements of this chromosome

Throws:

NullPointerException - if the given array is null

Since:

3.0

toArray

public double[] toArray()

Returns a double array containing all the elements in this chromosome in a proper sequence.

Returns:

an array containing the elements of this chromosome

Since:

3.0

of

public static DoubleChromosome of(DoubleGene... genes)

Create a new DoubleChromosome with the given genes.

Parameters:

genes - the genes of the chromosome.

Returns:

a new chromosome with the given genes.

Throws:

IllegalArgumentException - if the length of the genes array is empty or the given genes doesn't have the same range.

NullPointerException - if the given genes array is null

of

public static DoubleChromosome of(Iterable<DoubleGene> genes)

Create a new DoubleChromosome with the given genes.

Parameters:

genes - the genes of the chromosome.

Returns:

a new chromosome with the given genes.

Throws:

NullPointerException - if the given genes are null

IllegalArgumentException - if the of the genes iterable is empty or the given genes doesn't have the same range.

Since:

4.3

of

public static DoubleChromosome of(double min,
 double max,
 IntRange lengthRange)

Create a new random chromosome.

Parameters:

min - the min value of the DoubleGenes (inclusively).

max - the max value of the DoubleGenes (exclusively).

lengthRange - the allowed length range of the chromosome.

Returns:

a new DoubleChromosome with the given parameter

Throws:

IllegalArgumentException - if the length of the gene sequence is empty, doesn't match with the allowed length range, the minimum or maximum of the range is smaller or equal zero, or the given range size is zero.

NullPointerException - if the given lengthRange is null

Since:

4.0

of

public static DoubleChromosome of(double min,
 double max,
 int length)

Create a new random DoubleChromosome.

Parameters:

min - the min value of the DoubleGenes (inclusively).

max - the max value of the DoubleGenes (exclusively).

length - the length of the chromosome.

Returns:

a new DoubleChromosome with the given parameter

Throws:

IllegalArgumentException - if the length is smaller than one.

of

public static DoubleChromosome of(DoubleRange range,
 IntRange lengthRange)

Create a new random chromosome.

Parameters:

range - the integer range of the chromosome.

lengthRange - the allowed length range of the chromosome.

Returns:

a new DoubleChromosome with the given parameter

Throws:

IllegalArgumentException - if the length of the gene sequence is empty, doesn't match with the allowed length range, the minimum or maximum of the range is smaller or equal zero, or the given range size is zero.

NullPointerException - if the given lengthRange is null

Since:

4.0

of

public static DoubleChromosome of(DoubleRange range,
 int length)

Create a new random DoubleChromosome.

Parameters:

range - the integer range of the chromosome.

length - the length of the chromosome.

Returns:

a new random DoubleChromosome

Throws:

NullPointerException - if the given range is null

IllegalArgumentException - if the length is smaller than one.

Since:

3.2

of

public static DoubleChromosome of(double min,
 double max)

Create a new random DoubleChromosome of length one.

Parameters:

min - the minimal value of this chromosome (inclusively).

max - the maximal value of this chromosome (exclusively).

Returns:

a new DoubleChromosome with the given parameter

of

public static DoubleChromosome of(DoubleRange range)

Create a new random DoubleChromosome of length one.

Parameters:

range - the double range of the chromosome.

Returns:

a new random DoubleChromosome of length one

Throws:

NullPointerException - if the given range is null

Since:

3.2

min

public Double min()

Description copied from interface: BoundedChromosome

Return the minimum value of this BoundedChromosome.

Specified by:

min in interface BoundedChromosome<A extends Comparable<? super A>,G extends BoundedGene<A,G>>

Returns:

the minimum value of this BoundedChromosome.

max

public Double max()

Description copied from interface: BoundedChromosome

Return the maximum value of this BoundedChromosome.

Specified by:

max in interface BoundedChromosome<A extends Comparable<? super A>,G extends BoundedGene<A,G>>

Returns:

the maximum value of this BoundedChromosome.

hashCode

public int hashCode()

equals

public boolean equals(Object obj)

lengthRange

public IntRange lengthRange()

Return the allowed length range of the chromosome. The minimum value of the range is included and the maximum value is excluded.

Returns:

the allowed length range of the chromosome