Algorithm-AdaBoost

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inc/Module/Install.pm  view on Meta::CPAN

	# all of the following checks should be included in import(),
	# to allow "eval 'require Module::Install; 1' to test
	# installation of Module::Install. (RT #51267)
	#-------------------------------------------------------------

	# Whether or not inc::Module::Install is actually loaded, the
	# $INC{inc/Module/Install.pm} is what will still get set as long as
	# the caller loaded module this in the documented manner.
	# If not set, the caller may NOT have loaded the bundled version, and thus
	# they may not have a MI version that works with the Makefile.PL. This would
	# result in false errors or unexpected behaviour. And we don't want that.
	my $file = join( '/', 'inc', split /::/, __PACKAGE__ ) . '.pm';
	unless ( $INC{$file} ) { die <<"END_DIE" }

Please invoke ${\__PACKAGE__} with:

	use inc::${\__PACKAGE__};

not:

	use ${\__PACKAGE__};

inc/Module/Install.pm  view on Meta::CPAN

	# is unreliable on some platforms and requires write permissions)
	# for now we should catch this and refuse to run.
	if ( -f $0 ) {
		my $s = (stat($0))[9];

		# If the modification time is only slightly in the future,
		# sleep briefly to remove the problem.
		my $a = $s - time;
		if ( $a > 0 and $a < 5 ) { sleep 5 }

		# Too far in the future, throw an error.
		my $t = time;
		if ( $s > $t ) { die <<"END_DIE" }

Your installer $0 has a modification time in the future ($s > $t).

This is known to create infinite loops in make.

Please correct this, then run $0 again.

END_DIE

inc/Module/Install.pm  view on Meta::CPAN

			goto &$code unless $cwd eq $pwd;
		}
		unless ($$sym =~ s/([^:]+)$//) {
			# XXX: it looks like we can't retrieve the missing function
			# via $$sym (usually $main::AUTOLOAD) in this case.
			# I'm still wondering if we should slurp Makefile.PL to
			# get some context or not ...
			my ($package, $file, $line) = caller;
			die <<"EOT";
Unknown function is found at $file line $line.
Execution of $file aborted due to runtime errors.

If you're a contributor to a project, you may need to install
some Module::Install extensions from CPAN (or other repository).
If you're a user of a module, please contact the author.
EOT
		}
		my $method = $1;
		if ( uc($method) eq $method ) {
			# Do nothing
			return;

inc/Test/More.pm  view on Meta::CPAN

    my $diag;

    if( !defined $object ) {
        $obj_name = 'The thing' unless defined $obj_name;
        $diag = "$obj_name isn't defined";
    }
    else {
        my $whatami = ref $object ? 'object' : 'class';
        # We can't use UNIVERSAL::isa because we want to honor isa() overrides
        my( $rslt, $error ) = $tb->_try( sub { $object->isa($class) } );
        if($error) {
            if( $error =~ /^Can't call method "isa" on unblessed reference/ ) {
                # Its an unblessed reference
                $obj_name = 'The reference' unless defined $obj_name;
                if( !UNIVERSAL::isa( $object, $class ) ) {
                    my $ref = ref $object;
                    $diag = "$obj_name isn't a '$class' it's a '$ref'";
                }
            }
            elsif( $error =~ /Can't call method "isa" without a package/ ) {
                # It's something that can't even be a class
                $obj_name = 'The thing' unless defined $obj_name;
                $diag = "$obj_name isn't a class or reference";
            }
            else {
                die <<WHOA;
WHOA! I tried to call ->isa on your $whatami and got some weird error.
Here's the error.
$error
WHOA
            }
        }
        else {
            $obj_name = "The $whatami" unless defined $obj_name;
            if( !$rslt ) {
                my $ref = ref $object;
                $diag = "$obj_name isn't a '$class' it's a '$ref'";
            }
        }

inc/Test/More.pm  view on Meta::CPAN

sub new_ok {
    my $tb = Test::More->builder;
    $tb->croak("new_ok() must be given at least a class") unless @_;

    my( $class, $args, $object_name ) = @_;

    $args ||= [];
    $object_name = "The object" unless defined $object_name;

    my $obj;
    my( $success, $error ) = $tb->_try( sub { $obj = $class->new(@$args); 1 } );
    if($success) {
        local $Test::Builder::Level = $Test::Builder::Level + 1;
        isa_ok $obj, $class, $object_name;
    }
    else {
        $tb->ok( 0, "new() died" );
        $tb->diag("    Error was:  $error");
    }

    return $obj;
}

#line 741

sub subtest {
    my ($name, $subtests) = @_;

inc/Test/More.pm  view on Meta::CPAN

USE
    }
    else {
        $code = <<USE;
package $pack;
use $module \@{\$args[0]};
1;
USE
    }

    my( $eval_result, $eval_error ) = _eval( $code, \@imports );
    my $ok = $tb->ok( $eval_result, "use $module;" );

    unless($ok) {
        chomp $eval_error;
        $@ =~ s{^BEGIN failed--compilation aborted at .*$}
                {BEGIN failed--compilation aborted at $filename line $line.}m;
        $tb->diag(<<DIAGNOSTIC);
    Tried to use '$module'.
    Error:  $eval_error
DIAGNOSTIC

    }

    return $ok;
}

sub _eval {
    my( $code, @args ) = @_;

    # Work around oddities surrounding resetting of $@ by immediately
    # storing it.
    my( $sigdie, $eval_result, $eval_error );
    {
        local( $@, $!, $SIG{__DIE__} );    # isolate eval
        $eval_result = eval $code;              ## no critic (BuiltinFunctions::ProhibitStringyEval)
        $eval_error  = $@;
        $sigdie      = $SIG{__DIE__} || undef;
    }
    # make sure that $code got a chance to set $SIG{__DIE__}
    $SIG{__DIE__} = $sigdie if defined $sigdie;

    return( $eval_result, $eval_error );
}

#line 902

sub require_ok ($) {
    my($module) = shift;
    my $tb = Test::More->builder;

    my $pack = caller;

    # Try to determine if we've been given a module name or file.
    # Module names must be barewords, files not.
    $module = qq['$module'] unless _is_module_name($module);

    my $code = <<REQUIRE;
package $pack;
require $module;
1;
REQUIRE

    my( $eval_result, $eval_error ) = _eval($code);
    my $ok = $tb->ok( $eval_result, "require $module;" );

    unless($ok) {
        chomp $eval_error;
        $tb->diag(<<DIAGNOSTIC);
    Tried to require '$module'.
    Error:  $eval_error
DIAGNOSTIC

    }

    return $ok;
}

sub _is_module_name {
    my $module = shift;

lib/Algorithm/AdaBoost.pm  view on Meta::CPAN

    weak_classifier_generator => $weak_classifier_generator,
  } => $class;
}

sub calculate_classifier_weight {
  args
    my $self,
    my $classifier => 'CodeRef',
    my $distribution => 'ArrayRef[Num]';

  my $error_ratio = $self->evaluate_error_ratio(
    classifier => $classifier,
    distribution => $distribution,
  );
  return log((1 - $error_ratio) / $error_ratio) / 2;
}

sub classify {
  args_pos
    my $self,
    my $feature => 'Any';
  Carp::croak 'Training phase is undone yet.' unless $self->trained;
  $self->final_classifier->classify($feature);
}

lib/Algorithm/AdaBoost.pm  view on Meta::CPAN

  my @distribution = map {
    my $training_data = $training_set->[$_];
    $previous_distribution->[$_]
      * exp(-$weight * $training_data->{label}
              * $classifier->($training_data->{feature}));
  } 0 .. $#$previous_distribution;
  my $partition_function = List::Util::sum(@distribution);
  [ map { $_ / $partition_function } @distribution ];
}

sub evaluate_error_ratio {
  args
    my $self,
    my $classifier => 'CodeRef',
    my $distribution => 'ArrayRef[Num]';

  my $accuracy = 0;
  for my $i (0 .. $#$distribution) {
    my $training_data = $self->training_set->[$i];
    if ($classifier->($training_data->{feature}) == $training_data->{label}) {
      $accuracy += $distribution->[$i];