They look like file path, so you can make use of basename() first,
then use gsub to strip the suffix.
> x<-c("F:/Naval_Live_Oaks/2005/data//BE.tif","F:/Naval_Live_Oaks/2005/data//CH.tif")
> x2<-sapply(x,basename,USE.NAMES=FALSE)
> gsub("[.].{1,}$","",x2)
[1] "BE" "CH"
Ronggui
2009/5/26 Monica Pisica <pisican...@hotmail.com>:
>
> Hi everybody,
>
> I have a vector of characters and i would like to extract certain parts. My
> vector is named metr_list:
>
> [1] "F:/Naval_Live_Oaks/2005/data//BE.tif"
> [2] "F:/Naval_Live_Oaks/2005/data//CH.tif"
> [3] "F:/Naval_Live_Oaks/2005/data//CRR.tif"
> [4] "F:/Naval_Live_Oaks/2005/data//HOME.tif"
>
> And i would like to extract BE, CH, CRR, and HOME in a different vector named
> "names.id" for example. I read the help files for sub and grep and the likes
> but i have to recognize that i did not understand it. So i've done this
> (which does the job but extremely clumsy):
>
> b <- strsplit(metr_list, "//")
> b <- unlist(b)
> d <- strsplit(b, "\\.")
> d <- unlist(d)
> names.id <- d[c(2, 5, 8, 11)]
>
> Can anybody show what would be the proper way to achieve this with some
> explanations?
>
> Thanks,
>
> Monica
> _________________________________________________________________
> Hotmail® goes with you.
>
> ial_Mobile1_052009
> ______________________________________________
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> and provide commented, minimal, self-contained, reproducible code.
>
--
HUANG Ronggui, Wincent
PhD Candidate
Dept of Public and Social Administration
City University of Hong Kong
Home page: http://asrr.r-forge.r-project.org/rghuang.html
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