search.cpan.org is shutting down
J. J. Merelo-Guervós > Algorithm-Evolutionary-0.79_1 > Algorithm::Evolutionary::Individual::Vector

Algorithm-Evolutionary-0.79_1.tar.gz

Dependencies

Annotate this POD

# CPAN RT

 Open 0
View/Report Bugs
Module Version: 3.2   Source   Latest Release: Algorithm-Evolutionary-0.80

# NAME

Algorithm::Evolutionary::Individual::Vector - Array as an individual for evolutionary computation

# SYNOPSIS

```    use Algorithm::Evolutionary::Individual::Vector;
my \$indi = new Algorithm::Evolutionary::Individual::Vector 10 ; # Build random vector individual with length 10
# Each element in the range 0 .. 1
my \$indi2 = new Algorithm::Evolutionary::Individual::Vector 20, -5, 5; #Same, with range between -5 and 5

#Creating a vector step by step. In Perl, there's always more than one way of doing it
my \$indi3 = new Algorithm::Evolutionary::Individual::Vector;
\$indi3->set( {length => 20,
rangestart => -5,
rangeend => 5 } );   #Sets values, but does not build the array

\$indi3->randomize(); #Creates an array using above parameters

print \$indi3->Atom( 7 );       #Returns the value of the 7th character
\$indi3->Atom( 3 ) = '2.35';       #Sets the value

\$indi3->addAtom( 7.5 ); #Adds a new component to the array at the end

my \$indi4 = Algorithm::Evolutionary::Individual::Vector->fromString( '3.5,4.5, 0.1, 3.2');
#Parses the comma-separated elements of the string and creates a Algorithm::Evolutionary::Individual::Vector from them

my \$indi5 = \$indi4->clone(); #Creates a copy of the individual

my @array = qw( 3.5 4.8 3.3 4.2 0.23); #Tie a vector individual
tie my @vector, 'Algorithm::Evolutionary::Individual::Vector', @array;
print tied( @vector )->asXML();

print \$indi3->as_string(); #Prints the individual
print \$indi3->asXML() #Prints it as XML. See L<XML> for more info on this```

# Base Class

Algorithm::Evolutionary::Individual::Base

# DESCRIPTION

Array individual for a EA. Generally used for floating-point arrays. It can be also TIEd so that it can be handled as a normal array.

# METHODS

## new( [\$length = 10] [, \$start_of_range = 0] [, \$end_of_range = 1] )

Creates a new random array individual, with fixed initial length, and uniform distribution of values within a range

## size()

Returns vector size (dimension)

## set( \$ref_to_hash )

Sets values of an individual; takes a hash as input. The array is initialized to a null array, and the start and end range are initialized by default to 0 and 1

## randomize()

Assigns random values to the elements

## Atom

Gets or sets the value of an atom

Adds an atom at the end

## length()

Returns the number of atoms in the individual

## fromString( \$string )

Similar to a copy ctor; creates a vector individual from a string composed of stuff separated by a separator

## clone()

Similar to a copy ctor: creates a new individual from another one

## asString()

Returns a string with chromosome plus fitness. OK, this is a bit confusing

## as_string()

Returns just the chromosome, not the fitness

## asXML()

Prints it as XML. See the Algorithm::Evolutionary::XML OPEAL manual for details.

## Chrom( [\$ref_to_array]

Sets or gets the array that holds the chromosome. Not very nice, and I would never ever do this in C++

```  This file is released under the GPL. See the LICENSE file included in this distribution,