Hi all,
I am working with Agilent microarray data and trying to extract only the
accession numbers from the output probe annotation. Basically I have a
column detailing the probe as follows:

ref|NM_004564|ref|PET112L:2131|mgc|BC130348:2158
ref|NM_007266|ref|XAB1:2255|mgc|BC007451:2239
mgc|BC034752:79
ref|NM_057094|ref|CRYBA2:-2513|ref|NM_005209:-2519|ref|NM_194302:45605|mirna|hsa-mir-375:5790
...

I am trying to extract only the Refseq IDs (in this case NM_004564,
NM_007266, NM_057094, NM_005209, NM_194302.....) and create a new column
with the IDs. I am not able to figure out how to do this. I tried using  the
function 'strsplit',  but it doesn't work.
I am a newbie to R/Bioconductor and would appreciate if someone can help.

Thanks.
Hari

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