[Bioperl-l] Scale with Bio::Grahics for upstream regions

[Joao Magalhaes]

Hi!

I'm using Bio::Graphics to display putative transcription factor binding 
sites upstream of the ORF. My problem is that I need to show negative 
values in regard to the distance to the ORF. How can I draw a scale with 
negative values? For the moment I draw a scale like this:

my $full_length = Bio::SeqFeature::Generic->new(-start=>1,-end=>1000, 
-seq_id=>"$query");
$panel->add_track($full_length,
                 -glyph   => 'arrow',
                 -tick    => 1,
                 -fgcolor => 'black',
                 );

But I want start to be "-1000" and end "-1". Only if I put negative values, 
the scale disappears. Any suggestions?

Thanks.


Joao Magalhaes (joao.magalhaes at fundp.ac.be)

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