On May 25, 2011, at 4:46 AM, zoe.cryocla wrote:
Hi again,
I've got another question...
I often use the symbol == to select some levels of factor variables
like :
data[data$var=="blabla", [
But this time, I'd like to select all the levels of my variable wich
contain
the letter "B", is that a way to determine this conditions ?
Perhaps with grep and/or %in%
Got a reproducible example? ...preferably constructed with dput
--
David Winsemius, MD
West Hartford, CT
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