dfr <- data.frame(txt= c("abab","ghghg","ththt","dfdfdf"), yvar=1:4)
ind <- substr(dfr$txt,1,2)
dfr[ind == "ab",]
greetings,
Remko
--
View this message in context: http://r.789695.n4.nabble.com/Searching-for-the-first-two-characters-of-a-string-tp4089862p4090042.html
Sent from the R help mailing list archive at Nabble.com.