AI-Genetic-Pro
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lib/AI/Genetic/Pro.pm view on Meta::CPAN
croak(q/Type of chromosomes cannot be "combination" if "variable length" feature is active!/)
if $self->type eq q/combination/ and $self->variable_length;
croak(q/You must specify a crossover strategy with -strategy!/)
unless defined ($self->strategy);
croak(q/Type of chromosomes cannot be "combination" if strategy is not one of: OX, PMX!/)
if $self->type eq q/combination/ and ($self->strategy->[0] ne q/OX/ and $self->strategy->[0] ne q/PMX/);
croak(q/Strategy cannot be "/,$self->strategy->[0],q/" if "variable length" feature is active!/ )
if ($self->strategy->[0] eq 'PMX' or $self->strategy->[0] eq 'OX') and $self->variable_length;
#-------------------------------------------------------------------
$self->_set_strict if $self->strict;
#-------------------------------------------------------------------
return $self unless $self->mce;
#-------------------------------------------------------------------
delete $self->{ mce };
'AI::Genetic::Pro::MCE'->use or die q[Cannot raise multicore support: ] . $@;
return AI::Genetic::Pro::MCE->new( $self, \%args );
}
#=======================================================================
sub _Cache { $_Cache; }
#=======================================================================
# INIT #################################################################
#=======================================================================
sub _set_strict {
my ($self) = @_;
# fitness
my $fitness = $self->fitness();
my $replacement = sub {
my @tmp = @{$_[1]};
my $ret = $fitness->(@_);
my @cmp = @{$_[1]};
die qq/Chromosome was modified in a fitness function from "@tmp" to "@{$_[1]}"!\n/ unless compare(\@tmp, \@cmp);
return $ret;
};
$self->fitness($replacement);
}
#=======================================================================
sub _fitness_cached {
my ($self, $chromosome) = @_;
#my $key = md5_hex(${tied(@$chromosome)});
my $key = md5_hex( $self->_package ? md5_hex( ${ tied( @$chromosome ) } ) : join( q[:], @$chromosome ) );
return $_Cache->{$key} if exists $_Cache->{$key};
$_Cache->{$key} = $self->_fitness_real->($self, $chromosome);
return $_Cache->{$key};
}
#=======================================================================
sub _init_cache {
my ($self) = @_;
$self->_fitness_real($self->fitness);
$self->fitness(\&_fitness_cached);
return;
}
#=======================================================================
sub _check_data_ref {
my ($self, $data_org) = @_;
my $data = clone($data_org);
my $ars;
for(0..$#$data){
next if $ars->{$data->[$_]};
$ars->{$data->[$_]} = 1;
unshift @{$data->[$_]}, undef;
}
return $data;
}
#=======================================================================
# we have to find C to (in some cases) incrase value of range
# due to design model
sub _find_fix_range {
my ($self, $data) = @_;
for my $idx (0..$#$data){
if($data->[$idx]->[1] < 1){
my $const = 1 - $data->[$idx]->[1];
push @{$self->_fix_range}, $const;
$data->[$idx]->[1] += $const;
$data->[$idx]->[2] += $const;
}else{ push @{$self->_fix_range}, 0; }
}
return $data;
}
#=======================================================================
sub init {
my ( $self, $data ) = @_;
croak q/You have to pass some data to "init"!/ unless $data;
#-------------------------------------------------------------------
$self->generation(0);
$self->_init( $data );
$self->_fitness( { } );
$self->_fix_range( [ ] );
$self->_history( [ [ ], [ ], [ ] ] );
$self->_init_cache if $self->cache;
#-------------------------------------------------------------------
if($self->type eq q/listvector/){
croak(q/You have to pass array reference if "type" is set to "listvector"/) unless ref $data eq 'ARRAY';
$self->_translations( $self->_check_data_ref($data) );
}elsif($self->type eq q/bitvector/){
croak(q/You have to pass integer if "type" is set to "bitvector"/) if $data !~ /^\d+$/o;
$self->_translations( [ [ 0, 1 ] ] );
$self->_translations->[$_] = $self->_translations->[0] for 1..$data-1;
}elsif($self->type eq q/combination/){
croak(q/You have to pass array reference if "type" is set to "combination"/) unless ref $data eq 'ARRAY';
$self->_translations( [ clone($data) ] );
$self->_translations->[$_] = $self->_translations->[0] for 1..$#$data;
}elsif($self->type eq q/rangevector/){
croak(q/You have to pass array reference if "type" is set to "rangevector"/) unless ref $data eq 'ARRAY';
$self->_translations( $self->_find_fix_range( $self->_check_data_ref($data) ));
}else{
croak(q/You have to specify first "type" of vector!/);
}
my $size = 0;
if($self->type ne q/rangevector/){ for(@{$self->_translations}){ $size = $#$_ if $#$_ > $size; } }
# else{ for(@{$self->_translations}){ $size = $_->[1] if $_->[1] > $size; } }
else{ for(@{$self->_translations}){ $size = $_->[2] if $_->[2] > $size; } } # Provisional patch for rangevector values truncated to signed 8-bit quantities. Thx to Tod Hagan
my $package = get_package_by_element_size($size);
$self->_package($package);
my $length = ref $data ? sub { $#$data; } : sub { $data - 1 };
if($self->variable_length){
$length = ref $data ? sub { 1 + int( rand( $#{ $self->_init } ) ); } : sub { 1 + int( rand( $self->_init - 1) ); };
}
$self->_length( $length );
$self->chromosomes( [ ] );
push @{$self->chromosomes},
AI::Genetic::Pro::Chromosome->new($self->_translations, $self->type, $package, $length->())
for 1..$self->population;
$self->_calculate_fitness_all();
}
#=======================================================================
# SAVE / LOAD ##########################################################
#=======================================================================
sub spew {
#+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
STORABLE->use( qw( store retrieve freeze thaw ) ) or croak(q/You need "/.STORABLE.q/" module to save a state of "/.__PACKAGE__.q/"!/);
$Storable::Deparse = 1;
$Storable::Eval = 1;
#+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
my ( $self ) = @_;
my $clone = {
_selector => undef,
_strategist => undef,
_mutator => undef,
};
$clone->{ chromosomes } = [ map { ${ tied( @$_ ) } } @{ $self->chromosomes } ]
if $self->_package;
foreach my $key(keys %$self){
next if exists $clone->{$key};
$clone->{$key} = $self->{$key};
}
return $clone;
}
#=======================================================================
sub slurp {
my ( $self, $dump ) = @_;
if( my $typ = $self->_package ){
@{ $dump->{ chromosomes } } = map {
my $arr = $typ->make_with_packed( $_ );
bless $arr, q[AI::Genetic::Pro::Chromosome];
} @{ $dump->{ chromosomes } };
}
%$self = %$dump;
return 1;
}
#=======================================================================
sub save {
my ( $self, $file ) = @_;
croak(q/You have to specify file!/) unless defined $file;
store( $self->spew, $file );
}
#=======================================================================
sub load {
#+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
STORABLE->use( qw( store retrieve freeze thaw ) ) or croak(q/You need "/.STORABLE.q/" module to load a state of "/.__PACKAGE__.q/"!/);
$Storable::Deparse = 1;
$Storable::Eval = 1;
#+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
my ($self, $file) = @_;
croak(q/You have to specify file!/) unless defined $file;
my $clone = retrieve($file);
return carp('Incorrect file!') unless $clone;
return $self->slurp( $clone );
}
#=======================================================================
# CHARTS ###############################################################
#=======================================================================
sub chart {
GD->require or croak(q/You need "/.GD.q/" module to draw chart of evolution!/);
my ($self, %params) = (shift, @_);
my $graph = GD()->new(($params{-width} || 640), ($params{-height} || 480));
my $data = $self->getHistory;
if(defined $params{-font}){
$graph->set_title_font ($params{-font}, 12);
$graph->set_x_label_font($params{-font}, 10);
$graph->set_y_label_font($params{-font}, 10);
$graph->set_legend_font ($params{-font}, 8);
}
$graph->set_legend(
$params{legend1} || q/Max value/,
$params{legend2} || q/Mean value/,
$params{legend3} || q/Min value/,
);
$graph->set(
x_label_skip => int(($data->[0]->[-1]*4)/100),
x_labels_vertical => 1,
x_label_position => .5,
y_label_position => .5,
y_long_ticks => 1, # poziome linie
x_ticks => 1, # poziome linie
l_margin => 10,
b_margin => 10,
r_margin => 10,
t_margin => 10,
show_values => (defined $params{-show_values} ? 1 : 0),
values_vertical => 1,
values_format => ($params{-format} || '%.2f'),
zero_axis => 1,
#interlaced => 1,
logo_position => 'BR',
legend_placement => 'RT',
bgclr => 'white',
boxclr => '#FFFFAA',
transparent => 0,
title => ($params{'-title'} || q/Evolution/ ),
x_label => ($params{'-x_label'} || q/Generation/),
y_label => ($params{'-y_label'} || q/Value/ ),
( $params{-logo} && -f $params{-logo} ? ( logo => $params{-logo} ) : ( ) )
);
my $gd = $graph->plot( [ [ 0..$#{$data->[0]} ], @$data ] ) or croak($@);
open(my $fh, '>', $params{-filename}) or croak($@);
binmode $fh;
print $fh $gd->png;
close $fh;
return 1;
}
#=======================================================================
# TRANSLATIONS #########################################################
#=======================================================================
sub as_array_def_only {
my ($self, $chromosome) = @_;
return $self->as_array($chromosome)
if not $self->variable_length or $self->variable_length < 2;
if( $self->type eq q/bitvector/ ){
return $self->as_array($chromosome);
}else{
my $ar = $self->as_array($chromosome);
my $idx = first_index { $_ } @$ar;
my @array = @$ar[$idx..$#$chromosome];
return @array if wantarray;
return \@array;
}
}
#=======================================================================
sub as_array {
my ($self, $chromosome) = @_;
if($self->type eq q/bitvector/){
# This could lead to internal error, bacause of underlaying Tie::Array::Packed
#return @$chromosome if wantarray;
#return $chromosome;
my @chr = @$chromosome;
return @chr if wantarray;
return \@chr;
}elsif($self->type eq q/rangevector/){
my $fix_range = $self->_fix_range;
my $c = -1;
#my @array = map { $c++; warn "WARN: $c | ",scalar @$chromosome,"\n" if not defined $fix_range->[$c]; $_ ? $_ - $fix_range->[$c] : undef } @$chromosome;
my @array = map { $c++; $_ ? $_ - $fix_range->[$c] : undef } @$chromosome;
return @array if wantarray;
return \@array;
}else{
my $cnt = 0;
my @array = map { $self->_translations->[$cnt++]->[$_] } @$chromosome;
return @array if wantarray;
return \@array;
}
}
#=======================================================================
sub as_string_def_only {
my ($self, $chromosome) = @_;
return $self->as_string($chromosome)
if not $self->variable_length or $self->variable_length < 2;
lib/AI/Genetic/Pro.pm view on Meta::CPAN
croak "You must specify a selection strategy!"
unless defined $self->selection;
my @tmp = @{$self->selection};
my $selector = q/AI::Genetic::Pro::Selection::/ . shift @tmp;
$selector->require or die $!;
$self->_selector($selector->new(@tmp));
}
$self->_parents($self->_selector->run($self));
return;
}
#=======================================================================
sub _crossover {
my ($self) = @_;
unless($self->_strategist){
my @tmp = @{$self->strategy};
my $strategist = q/AI::Genetic::Pro::Crossover::/ . shift @tmp;
$strategist->require or die $!;
$self->_strategist($strategist->new(@tmp));
}
my $a = $self->_strategist->run($self);
$self->chromosomes( $a );
return;
}
#=======================================================================
sub _mutation {
my ($self) = @_;
unless($self->_mutator){
my $mutator = q/AI::Genetic::Pro::Mutation::/ . ucfirst(lc($self->type));
unless($mutator->require){
$mutator = q/AI::Genetic::Pro::Mutation::Listvector/;
$mutator->require;
}
$self->_mutator($mutator->new);
}
return $self->_mutator->run($self);
}
#=======================================================================
sub _save_history {
my @tmp;
if($_[0]->history){ @tmp = $_[0]->getAvgFitness; }
else { @tmp = (undef, undef, undef); }
push @{$_[0]->_history->[0]}, $tmp[0];
push @{$_[0]->_history->[1]}, $tmp[1];
push @{$_[0]->_history->[2]}, $tmp[2];
return 1;
}
#=======================================================================
sub inject {
my ($self, $candidates) = @_;
for(@$candidates){
push @{$self->chromosomes},
AI::Genetic::Pro::Chromosome->new_from_data($self->_translations, $self->type, $self->_package, $_, $self->_fix_range);
$self->_fitness->{$#{$self->chromosomes}} = $self->fitness()->($self, $self->chromosomes->[-1]);
}
$self->_strict( [ ] );
$self->population( $self->population + scalar( @$candidates ) );
return 1;
}
#=======================================================================
sub _state {
my ( $self ) = @_;
my @res;
if( $self->_package ){
@res = map {
[
${ tied( @{ $self->chromosomes->[ $_ ] } ) },
$self->_fitness->{ $_ },
]
} 0 .. $self->population - 1
}else{
@res = map {
[
$self->chromosomes->[ $_ ],
$self->_fitness->{ $_ },
]
} 0 .. $self->population - 1
}
return \@res;
}
#=======================================================================
sub evolve {
my ($self, $generations) = @_;
# generations must be defined
$generations ||= -1;
if($self->strict and $self->_strict){
for my $idx (0..$#{$self->chromosomes}){
croak(q/Chromosomes was modified outside the 'evolve' function!/) unless $self->chromosomes->[$idx] and $self->_strict->[$idx];
my @tmp0 = @{$self->chromosomes->[$idx]};
my @tmp1 = @{$self->_strict->[$idx]};
croak(qq/Chromosome was modified outside the 'evolve' function from "@tmp0" to "@tmp1"!/) unless compare(\@tmp0, \@tmp1);
}
}
# split into two loops just for speed
unless($self->preserve){
for(my $i = 0; $i != $generations; $i++){
# terminate ----------------------------------------------------
last if $self->terminate and $self->terminate->($self);
# update generation --------------------------------------------
$self->generation($self->generation + 1);
# update history -----------------------------------------------
$self->_save_history;
# selection ----------------------------------------------------
$self->_select_parents();
# crossover ----------------------------------------------------
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