b<-c("1","2","3","4","<1")
grep('<',b)
HTH,
Daniel
Ryan Utz-2 wrote:
>
> Hi all,
>
> I'm trying to identify a particular digit or value within a vector of
> factors. Specifically, this is environmental data where in some cases the
> minimum value reported is "<" a particular number (and I want to
> manipulate
> only these). For example:
>
> x<-c("1","2","3","4","<1")
>
> For a dataset that is hundreds or thousands of lines long, I'd like to
> find
> or identify only those that have a "<" symbol (R automatically stores the
> entire vector in factor format due to these symbols when it imports the
> data-I don't mind converting if necessary). Eventually, I'd like to divide
> the number in half for these cases, but I think I have that coding lined
> up
> once I can just identify them from the stew.
>
> I've exhausted help and net resources so far...
>
> Thanks,
> Ryan
>
>
> --
>
> Ryan Utz, Ph.D.
> Aquatic Ecologist/STREON Scientist
> National Ecological Observatory Network
>
> Home/Cell: (724) 272-7769
> Work: (720) 746-4844 ext. 2488
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
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> PLEASE do read the posting guide
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> and provide commented, minimal, self-contained, reproducible code.
>
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