AI-Perceptron-Simple

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lib/AI/Perceptron/Simple.pm  view on Meta::CPAN

sub shuffle_data {
    my $stimuli = shift or croak "Please specify the original file name";
    my @shuffled_stimuli_names = @_ 
        or croak "Please specify the output files for the shuffled data";
    
    my @aoa;
    for ( @shuffled_stimuli_names ) {
        # copied from _real_validate_or_test
        # open for shuffling
        my $aoa = csv (in => $stimuli, encoding => ":encoding(utf-8)");
        my $attrib_array_ref = shift @$aoa; # 'remove' the header, it's annoying :)
        @aoa = shuffle( @$aoa ); # this can only process actual array
        unshift @aoa, $attrib_array_ref; # put back the headers before saving file

        csv( in => \@aoa, out => $_, encoding => ":encoding(utf-8)" ) 
        and
        print "Saved shuffled data into ", basename($_), "!\n";

    }
}

=head1 CREATION RELATED SUBROUTINES/METHODS

=head2 new ( \%options )

lib/AI/Perceptron/Simple.pm  view on Meta::CPAN

sub train {
    my $self = shift;
    my( $stimuli_train_csv, $expected_output_header, $save_nerve_to_file, $display_stats, $identifier ) = @_;
    
    $display_stats = 0 if not defined $display_stats;
    if ( $display_stats and not defined $identifier ) {
        croak "Please specifiy a string for \$identifier if you are trying to display stats";
    }
    
    # CSV processing is all according to the documentation of Text::CSV
    open my $data_fh, "<:encoding(UTF-8)", $stimuli_train_csv 
        or croak "Can't open $stimuli_train_csv: $!";
    
    my $csv = Text::CSV->new( {auto_diag => 1, binary => 1} );
    
    my $attrib = $csv->getline($data_fh);
    $csv->column_names( $attrib );

    # individual row
    ROW: while ( my $row = $csv->getline_hr($data_fh) ) {
        # print $row->{book_name}, " -> ";

lib/AI/Perceptron/Simple.pm  view on Meta::CPAN

    
    my $stimuli_validate = $data_hash_ref->{ stimuli_validate };
    my $predicted_index = $data_hash_ref->{ predicted_column_index };
    
    # actual processing starts here
    my $output_file = defined $data_hash_ref->{ results_write_to } 
                        ? $data_hash_ref->{ results_write_to }
                        : $stimuli_validate;
    
    # open for writing results
    my $aoa = csv (in => $stimuli_validate, encoding => ":encoding(utf-8)");
    
    my $attrib_array_ref = shift @$aoa; # 'remove' the header, it's annoying :)

    $aoa = _fill_predicted_values( $self, $stimuli_validate, $predicted_index, $aoa );

    # put back the array of headers before saving file
    unshift @$aoa, $attrib_array_ref;

    print "Saving data to $output_file\n";
    csv( in => $aoa, out => $output_file, encoding => ":encoding(utf-8)" );
    print "Done saving!\n";

}

=head2 &_fill_predicted_values ( $self, $stimuli_validate, $predicted_index, $aoa )

This is where the filling in of the predicted values takes place. Take note that the parameters naming are the same as the ones used in the C<validate> and C<test> method.

This subroutine should be called in the procedural way.

=cut

sub _fill_predicted_values {
    my ( $self, $stimuli_validate, $predicted_index, $aoa ) = @_;

    # CSV processing is all according to the documentation of Text::CSV
    open my $data_fh, "<:encoding(UTF-8)", $stimuli_validate 
        or croak "Can't open $stimuli_validate: $!";
    
    my $csv = Text::CSV->new( {auto_diag => 1, binary => 1} );
    
    my $attrib = $csv->getline($data_fh);
    
    $csv->column_names( $attrib );

    # individual row
    my $row = 0;

lib/AI/Perceptron/Simple.pm  view on Meta::CPAN

    my $actual_header = $info->{ actual_output_header };
    my $predicted_header = $info->{ predicted_output_header };
    my $more_stats = defined ( $info->{ more_stats } ) ? 1 : 0;
    
    my %c_matrix = ( 
        true_positive => 0, true_negative => 0, false_positive => 0, false_negative => 0,
        accuracy => 0, sensitivity => 0
    );
    
    # CSV processing is all according to the documentation of Text::CSV
    open my $data_fh, "<:encoding(UTF-8)", $file
        or croak "Can't open $file: $!";
    
    my $csv = Text::CSV->new( {auto_diag => 1, binary => 1} );
    
    my $attrib = $csv->getline($data_fh); # get the row of headers, can't specify any column
    # shouldn't be a problem, since we're reading line by line :)

    $csv->column_names( $attrib );

    # individual row