[R] Extracting only one part of an string

[Gabor Grothendieck]

Just replace the minus and everything after it with an empty string:

   sub("-.*", "", Names)

On Nov 19, 2007 2:14 AM, Tom.O <tom.olsson at dnbnor.com> wrote:
>
> Hi
> I wonder if there's a smarter way to do this procedure.
>
> I have a vector of filenames wher  I only am interested in the first part of
> the filename.
> I would use the following method of extracting the first part. But is there
> a more simple way of doing this?
>
> Names <-
> c("A1-F1.txt","A2-F1.txt","AB1-F1.txt","A1-F2.txt","AB1-F2.txt","B1-F2.txt")
> #..
> temp <- strsplit(Names,"-")
> temp <- unlist(temp)
> temp <- temp[seq(from=1,to=2*length(Names),by=2)]
>
> > temp
> [1] "A1"  "A2"  "AB1" "A1"  "AB1" "B1"
>
> Thanks for any feedback.
> Regards Tom
> --
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