On Tue, 4 Oct 2011, Sarah Goslee wrote:
You can use something like this:
testdata <- c("A1", "A2", "A3", "B1", "B2", "B3")
grep("^A", testdata)
[1] 1 2 3
grepl("^A", testdata)
[1] TRUE TRUE TRUE FALSE FALSE FALSE
Sarah,
I don't see how this gives me a data frame containing only those sites I
specify. I want to plot by sites-within-streams specifying which param
factor to use.
Thanks,
Rich
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