[BioC] extracting a column as a vector.
priya [guest]
guest at bioconductor.org
Thu Nov 8 09:25:56 CET 2012
I have a matrix in the following way :
probes p1 p2 p3 p4 p5
244971 5 6 7 8 9
244972 8 7 9 7 8
244973 4 3 2 6 7
244973 8 5 3 6 8
I would like to extract only the probe names and tried this:
degtl - original matrix( containing 22810 entries)
ids <- degtl[,1]
and I got
head(ids)
[1] 244941_at 244959_s_at 244974_at 245009_at 245024_at 245028_at
22810 Levels: 244901_at 244902_at 244903_at 244904_at 244905_at 244906_at 244907_at 244908_at ... AFFX-TrpnX-M_at.
I would like to extract the probe names as a vector in the following form :
ids<- c("244971","244972","244973",......) for all 22810 levels.Iam unable to do it and always end up with a list.
-- output of sessionInfo():
R version 2.15
Linux
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