[Bioperl-l] negative and decimal values in Bio::Graphics xyplot

[Albert Vilella]

Hi,

I was uploading an xyplot file for Hapmap's GBrowse browser, that
contains negative decimal numbers. For what I saw, there seems to be a
problem with the plotting of negative values.

I assume that decimal values are allowed, not seeing any problem in
Bio::Graphics::Glyph::xyplot. This would make feasible to plot things
like:

----------------
[expression]
glyph = xyplot
graph_type=boxes
fgcolor = black
bgcolor = darkslateblue
height=100
min_score = 0.000001
max_score = 0.001
label=1
key=variscan_MRA_plots_for_genotypes_chr1_YRI.w100000
reference=chr1

##mra_levels_1-9
expression      mra_levels_1-9_YRI      1750001..1850000        0.000109
expression      mra_levels_1-9_YRI      1850001..1950000        0.000003
expression      mra_levels_1-9_YRI      1950001..2050000        0.000022
expression      mra_levels_1-9_YRI      2050001..2150000        0.000053
[...]
----------------

But negative values are either a problem in xyplot, or unlikely, in any
other step in the process of importing the data in GBrowse.

Any hint?

Thanks,

    Albert.

-- 
Albert Vilella Bertran    avilella_at_ub_edu
--------------------------------------------
Departament de Genetica
Universitat de Barcelona
Diagonal 645 08028, Barcelona
Tel: +34 934035306 Fax: +34 934034420
--------------------------------------------
avilella_at_ebi_ac_uk
EMBL Outstation, European Bioinformatics Institute
Wellcome Trust Genome Campus, Hinxton
Cambs. CB10 1SD, United Kingdom
--------------------------------------------------