Try this:
#1
gsub(".*-", "", zzz)
#2
gsub("-.*", "", zzz)
On Mon, Aug 10, 2009 at 1:56 PM, James Perkins
<jperk...@biochem.ucl.ac.uk>wrote:
> Dear all,
>
> I am trying to split a matrix into 2 as efficiently as possible.
>
> It is a character matrix:
>
> 1 2 3 1 "2-271" "2-367" "1-79"
> 2 "2-282" "2-378" "1-90"
> 3 "2-281" "2-377" "1-89"
>
> I want to make 2 matrices from this, as succinctly and efficiently as
> possible.
>
> I've tried such things as sapply(matrix, strsplit, "-") and tried to go
> from there, but I can't figure it out! So far I do it with a 2D for loop
> which can't be efficient!
>
> firstPartM <- matrix(ncol= dim(zzz)[2], nrow= dim(zzz)[1])
> secondPartM <- matrix(ncol= dim(zzz)[2], nrow= dim(zzz)[1])
> for(i in 1:dim(zzz)[1]) {
> for(j in 1:dim(zzz)[2]) {
> splitS <- strsplit(zzz[i,j],"-")
> firstPartM[i,j] <- splitS[[1]][1]
> secondPartM[i,j] <- splitS[[1]][2]
> }
> }
>
> Cheers,
>
> Jim
>
> ______________________________________________
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
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