[Bioperl-l] Panel add_track -label option does not work

[Wes Barris]

Palle Villesen (BiRC) wrote:

> Hi,
> 
> Just checked the script, and here it does change the label nicely. When 
> given 0, no label is printed above each segment. When given 1, the $name 
> is printed above each and when given a fixed value (like 2 or 'palle' - 
> either 2 or palle is printed above each segment).
> 
> But I dop agree on quite bad documentation of the Bio::Graphics modules. 
> Took me a long time to figure out, and I'm still worried about simple 
> problems I can't solve. But check if you saved the perl between testing 
> of 0 and 1 - it should work...

You weren't a Microsoft support person in a former life, were you? :-)

Yes, I am saving the perl script between tests.  My computer is plugged
in and turned on.  I have done some more testing.  I have installed
bioperl on several systems:

Redhat 8.0 / Bioperl-1.2.2 / GD 2.07:
	"-label => 1" fails to produce names above the features.
Redhat 7.2 / Bioperl-1.2.1 / GD 1.33:
	"-label => 1" fails to produce names above the features.
Solaris 8  / Bioperl-1.2.2 / GD 1.33:
	"-label => 1" works properly (the name apears above each feature).

There is definately something subtly wrong with either bioperl-1.2.x,
Redhat installations, or some unknown dependency which silently only
affects the drawing of names above the features.

If there is anyone out there who is familiar with the code involved when
setting "-label=>1", can you tell me what I might try to fix this?

> 
> P.
> 
> 
> Wes Barris wrote:
> 
>> Hi,
>>
>> I am learning how to usr bioperl by following the examples on this page:
>>
>>     http://bioperl.org/HOWTOs/html/Graphics-HOWTO.html
>>
>> In example 1, the label option does not appear to affect the output:
>>
>>     my $track = $panel->add_track(-glyph => 'generic',-label  => 1);
>>
>> The instructions say that providing a true value to the -label option
>> will produce a label.  Switching this value between 0 and 1 has no affect
>> in the resulting png file. If I change the number to 2, it prints a '2'
>> above each track.
>>
>> I am probably missing something, but I am taking this example right out
>> of the web page.
> 
> 
> 


-- 
Wes Barris
E-Mail: Wes.Barris at csiro.au