[R] use value in variable to be name of another variable

[Aedin Culhane]

Hi  Matt
It looks like you are trying to obtain the upstream sequence data 
information given transcription factor binding sites???

There are a lot of functions in Bioconductor which are optimized for 
this type of analysis. If you wish to either post on the Bioconductor 
mailing list (https://support.bioconductor.org/), or tell me a little 
more, I can perhaps help.

Also see 
http://bioconductor.org/help/search/index.html?q=transcription+factor+binding/. 
There are several workflows and lots of docs on TFBS analysis.

Also Matt as you are local to Boston, I am happy to point you to local 
Boston resources if you are new to R/Bioconductor.

Best
Aedin

-- 
Aedin Culhane
---------------
Department of Biostatistics and Computational Biology,Dana-Farber Cancer Institute
Department of Biostatistics, Harvard TH Chan School of Public Health
email: aedin at jimmy.harvard.edu