On Tue, 4 Oct 2011, R. Michael Weylandt wrote:
This isn't going to be the most elegant, but it should work:
## Get the factors as characters
ff <- as.character(chemdata$site)
## Identify those that match what you want
ff <- grepl(ff, "BC-")
Michael,
Apparently grep works differently in R than it does on the command line:
bf <- grep(ff, "BC-")
Warning message:
In grep(ff, "BC-") :
argument 'pattern' has length > 1 and only the first element will be used
I understand what you suggest but it does not appear to work for me.
Thanks,
Rich
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