[BioC] retrieving chromosome lengths using biomaRt?

James W. MacDonald jmacdon at med.umich.edu
Tue Dec 5 14:48:17 CET 2006

Hi Shamit,

Shamit Soneji wrote:
> Hi all,
> I'm constructing a bunch of GFF files to load into a genome browser to
> display CHiP-on-chip data, and for this I need the length (in bases) of
> specific mouse chromosomes.
> I was hoping biomaRt might be able to do this, and I see an attempt was
> made here ( http://tinyurl.com/y7rbzo) which I can't get to work (for
> human or mouse).

You will have to give us more of a hint than that. Simply stating that 
you can't get something to work is so general that it has no meaning.

You need to give us an example of what you did, as well as the output 
you got from R. In addition, you need to give the output from sessionInfo().



> Any tips would be greatly appreciated.
> Shamit
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James W. MacDonald, M.S.
Affymetrix and cDNA Microarray Core
University of Michigan Cancer Center
1500 E. Medical Center Drive
7410 CCGC
Ann Arbor MI 48109

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