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Ross Lazarus
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>> Message: 7 Date: Fri, 01 Aug 2008 15:52:22 -0400 From: "Deanne
>> Taylor" <dtaylor at="" hsph.harvard.edu=""> Subject: [BioC] Is anyone
>> developing an extensible Galaxy-like interface for
Bioconductor? To:
>> <bioconductor at="" stat.math.ethz.ch=""> Message-ID:
>> <48933135.2DE5.00B2.0 at hsph.harvard.edu> Content-Type:
text/plain;
>> charset=US-ASCII
>>
>> Dear all:
>>
>> Iis anyone aware of any projects creating an extensible platform
>> that can act as an interface to Bioconductor that could be used to
>> deliver Bioconductor methods to non-command-line-using users?
>>
<disclosure>
I'm a galaxy developer so my views are probably biased
</disclosure>
Why not just use Galaxy to wrap the BioC packages? It will do what you
need and probably a lot more.
<potentially veering="" off="" topic="">
For those not yet aware, Galaxy (http://g2.trac.bx.psu.edu/) is an
open-source framework for wrapping executables into a web application
with workflows, persistent histories, transparent connections to
popular
annotation and data resources (BioMart/ucsc..) and a growing toolbox
of
applications - all of which completely insulate users from command
lines. Galaxy started out with a focus on evolutionary biology and
that's what's available at the main Galaxy site, but as a generic
platform for a computational workspace, it is easy to reconfigure for
your own requirements if you checkout the source and run it locally -
which you need to do for IRB protected data of course.
IMHO, Galaxy histories (persistent, shareable user workspaces
containing
complete records of all data, annotation, transformations and
analyses)
are one of the really important things it offers. Another strength is
that it is completely agnostic to the actual plugin executable -
anything that can run on the backend (potentially, a torque/SGE
cluster)
- java, R, C++ or heaven help us COBOL- as long as it takes
parameters
and is non-interactive - which means R scripts need to be written to
take CL parameters rather than run in the interactive interpreter
environment.
You can checkout a working copy of Galaxy to your linux box or mac
(see
http://g2.trac.bx.psu.edu/wiki/HowToInstall). With your own copy,
follow
the tutorial on adding a new (ugh, perl) tool at
http://g2.trac.bx.psu.edu/wiki/AddToolTutorial
Changing from perl to an R script wrapping a BioConductor package will
require the following steps:
1) figure out exactly what package functions/analyses/transformation
the
tool will wrap and thus, what inputs, outputs and parameter settings
you
want the user to control;
2) write and test an R wrapper for the package which takes those
parameters on the command line (must be non-interactive), reads it's
inputs from files named on the command line, and writes it's outputs
to
files named on the command line;
3) provide the interface descriptor as XML which Galaxy uses to
construct the right command line (including those inputs and outputs)
for the plugin executable and the web form for the user to set the
parameters which will be supplied to the executable (this is what you
will probably need help with initially - the source distribution
contains a lot of useful examples and the Galaxy dev mailing list is a
friendly place to get help);
4) add your new XML descriptor file to the tool_config.xml file;
5) restart your local Galaxy.
Some statistical genetics tools are visible at
http://galaxy.esphealth.org based on R/plink/eigenstrat and so on and
some of their uses are illustrated with some (now slightly dated)
screencasts at http://esphealth.org/screencasts. For those attending,
there are 3 educational sessions featuring Galaxy and the UCSC genome
browser at the upcoming ASHG meeting in Philly in November.
The Galaxy developer team is keen to help people wanting to develop
new
useful tools - in particular, we currently have no expression tools
available. We're ready and willing to help anyone interested in using
Galaxy to make BioConductor packages available to users in a
web-accessible framework that really does encourage transparent and
reproducible research.
Contact me privately if you have questions please.
</potentially>
--
Ross Lazarus MBBS MPH, Director of Bioinformatics
Channing Laboratory, 181 Longwood Ave., Boston MA 02115, USA.
Currently on vacation in Sydney: Tel +61 293657975 or Cell +61
404614043
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