On Apr 29, 2010, at 1:17 PM, Claus O'Rourke wrote:
Hi all,
I'm writing a script to do some basic text analysis in R. Let's assume
I have a data frame named data which contains a column named 'utt'
which contains strings. Is there a straightforward way to achieve
something like this:
data$ContainsThe <- ifelse(startsWith(data$Utt,"the"),"y","n")
or
data$ContainsThe <- ifelse(contains(data$Utt,"the"),"y","n")
?
I tried using grep
data$ContainsThe <- ifelse(grep("the",data$Utt),"y","n")
but this doesn't work
becausee grep only returns the rows for which
grep succeeded.
?grepl # which is on the same help page as grep
Thanks for any pointers
Claus
David Winsemius, MD
West Hartford, CT
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