Try this:
#1
gsub(".*-", "", zzz)
#2
gsub("-.*", "", zzz)
#3)
gsub(".*-(.*)-.*", "\\1", zzz)
On Mon, Aug 10, 2009 at 4:20 PM, Jun Shen <jun.shen...@gmail.com> wrote:
> Henrique,
>
> This is a very nice approach. I wonder what if I have data like 2-172-45
> and want to break it down into three parts 2, 172 and 45. How do we use your
> method to achieve it? Thanks.
>
> Jun
>
> On Mon, Aug 10, 2009 at 12:34 PM, Henrique Dallazuanna
> <www...@gmail.com>wrote:
>
>> 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
>> >
>> > ______________________________________________
>> > R-help@r-project.org mailing list
>> > https://stat.ethz.ch/mailman/listinfo/r-help
>> > 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
>>
>> [[alternative HTML version deleted]]
>>
>>
>> ______________________________________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>>
>
>
> --
> Jun Shen PhD
> PK/PD Scientist
> BioPharma Services
> Millipore Corporation
> 15 Research Park Dr.
> St Charles, MO 63304
> Direct: 636-720-1589
>
>
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O
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