[BioC] how to use writeFASTA in modality "append"

hpages at fhcrc.org hpages at fhcrc.org
Fri Jul 17 08:02:10 CEST 2009

Hi Maura,

I've added an 'append' argument to the writeFASTA() function.
This is available in the latest Biostrings release (2.12.8)
and devel (2.13.25). Both should propagate to our public
repositories in the next 24 hours. Please update your
installation by following the instructions here:



Quoting mauede at alice.it:

> It looks like Biostrings function "writeFASTA" overwrites the output  
>  file at each run.
> It seems it does not support the "append" parameter.
> I have to generate one big file gathering a miRNA identifier and   
> relative sequence followd by a variable number of  dara records   
> pertaining such a miRNA  target genes transcription.
> Each record is made up of  a 3'utr identifier   
> <hgnc_id>.<ensembl_id>.<transript_id>
> followed by the relative 3'UTR sequence.
> I hoped I could use writeFASTA but it does not allow me to append   
> sequences to the same output file.
> Any suggestion is more than welcome.
> Thank you in advance,
> Maura
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