Re: [R] vectorised recovery of strsplit value ??

Thanks Jorge, for your reply. In the end I changed my approach and used a sub() strategy I found on this forum to recover the prefixes as below. IDs.prefix <- sub("([^*])(_.*)", "\\1" , sampleIDs ) IDs.split <- cbind(sampleIDs , IDs.prefix) Regards M -- View this message in context: http://r.

Re: [R] vectorised recovery of strsplit value ??

Try sapply(strsplit(sampleIDs, "_"), "[", 1) HTH, Jorge On Wed, Dec 22, 2010 at 4:02 PM, maddox <> wrote: > > Dear Guru's > > My first steps with R have ground to a halt! I have a vector of sample > identifiers > > > sampleIDs > [1] "D1_1" "D1_2" "D1_3" "D1_4" "D1_5" "D1_6" "D1_7"

Re: [R] vectorised recovery of strsplit value ??

There are several ways to get a matrix, for example mat = as.matrix(as.data.frame(splitIDs)) or mat = sapply(splitIDs, I) True experts may suggests even more ways. Peter On Wed, Dec 22, 2010 at 1:02 PM, maddox wrote: > > Dear Guru's > > My first steps with R have ground to a halt! I have a v

Re: [R] vectorised recovery of strsplit value ?? Resolved

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[R] vectorised recovery of strsplit value ??

Dear Guru's My first steps with R have ground to a halt! I have a vector of sample identifiers > sampleIDs [1] "D1_1" "D1_2" "D1_3" "D1_4" "D1_5" "D1_6" "D1_7" "D1_8" [9] "D1_9" "D1_10" "D1_11" "D1_12" "F1_13" "F1_14" "F1_15" "F1_16" [17] "F1_17" "F1_18" "F1_19" "F1