[Bioperl-l] Bio::Graphics - Howto Show Negative Start-End and Enable Connector

[Edward Wijaya]

Dear expert,

My figure here: http://defiant.i2r.a-star.edu.sg/~ewijaya/misc/foo2.png
is created with the script (down below).

How can I modify the script such that:

1. The arrow track is represented in negative form.
    I.e. instead of 1 to 300, we use -300 to 0.

I tried this, but won't do:

my $flen = Bio::SeqFeature::Generic->new(
        -start => -300,
        -end => 0, );

And how can I make these number to appear
for every gridpoints (not just two as I have now).


2. How can I enable the connector with grid just like
   I had in the first panel? (as you can see, my script
   has connector added, but still doesn't show).

All, in all, I am trying to mimic this figure:
http://nar.oxfordjournals.org/content/vol31/issue13/images/large/gkg56702.jpeg

And here is my script:

__BEGIN__
#!/usr/bin/perl -w
use strict;
use Data::Dumper;
use Bio::Graphics;
use Bio::SeqFeature::Generic;
use List::Compare;
use List::Util qw(max);

my %nofseq = ( 0 => 300, 1 => 300, 2 => 300, 3 => 300, 4 => 300, 5 => 300 );
my @seqid = keys %nofseq;
my @lenlist = values %nofseq;
my $maxlen = max (@lenlist);
#print Dumper \@seqid ;

my $panel = Bio::Graphics::Panel->new(
    -length    => 300,
    -width     => 500,
    -pad_left  => 70,
    -pad_right => 70,
    -key_style => 'left',
    -connector => 'solid',
);

my $flen = Bio::SeqFeature::Generic->new(
        -start => 1,   # tried -300
        -end => 300, # and 0, but failed.
);

    my $track1 = $panel->add_track(
        $flen,
        -glyph   => 'arrow',
        -tick    => 2,
        -fgcolor => 'black',
        -double  => 1,
    );



my %nlist;

while ( <DATA> ) {
    chomp;
    next if /^\#/;
    my ($sqi,$pos,$str,$progname) = split /\,/;
    my $start = $pos + $nofseq{$sqi};
    my $end = $start + length($str) + 1;
    push @{$nlist{$sqi}}, $start." ".$end." ".$progname;
}

# Check which sequence has no motifs;
my @bssi = keys %nlist;

my $lc = List::Compare->new(\@seqid, \@bssi);
my @comp = $lc->get_unique;


foreach my $comp ( @comp  ) {
    push @{$nlist{$comp}}, '0'." ".'0'." "."NONE";

}

my %prog_color = ( "WEEDER" => 3000, "MEME" => 200, "NONE" => 0 );

foreach my $seqid ( sort keys %nlist ) {


    my $track = $panel->add_track(
        -glyph     => 'graded_segments',
        -key       => "SEQ ". $seqid,
        -connector => "dashed"
        -label     => 1,
        -bgcolor   => 'blue',
		-bump      =>  +1,
		-height    =>  8,
        -min_score => 0,
        -max_score => 5000
    );


    foreach my $range ( @{$nlist{$seqid}} ) {

        my ($st,$en,$progname) = split(" ", $range);
        my $dname = " ";
        if ( $st != 0 and $en !=0  ) {
           $dname = "Seq ". $seqid;
        }

        my $score;
        if ( $progname eq "WEEDER" ) {
            $score = $prog_color{$progname};

        }
        elsif ($progname eq "MEME" ) {
            $score = $prog_color{$progname};
        }

        my $feature = Bio::SeqFeature::Generic->new(
            -display_name => $dname,
            -start        => $st,
            -end          => $en,
            -score        => $score
        );

        $track->add_feature($feature);

    }

}

print $panel->png;

#The DATA is simply just list of string and its location in their
respective sequence.
# The figure is just the plot of it out.
__DATA__
# sequence number,pos,binding sites,program
4,-63,AGCTTTCTCT,MEME
0,-22,AACTTTGTAC,WEEDER
1,-13,AAGTTTCTCT,WEEDER
5,-228,ACCTTTGCCA,MEME
5,-121,AAGTTTGTCT,WEEDER
5,-88,AAGTTTTTCC,SPACE
3,-148,AACTTAGTCA,MEME
0,-184,AACTTTGTCT,MEME
__END__


Thanks and hope to hear from you again.

--
Regards,
Edward WIJAYA