"Charles Annis, P.E." <[EMAIL PROTECTED]> writes: > Greetings, Amigos: > > I have been trying without success to convert a character string, > > repeated.measures.columns > [1] "3,6,10" > > into c(3,6,10) for subsequent use. > > as.numeric(repeated.measures.columns) doesn't work (likely because of the > commas) > [1] NA > Warning message: > NAs introduced by coercion > > I've tried many things including > strsplit(repeated.measures.columns, split = ",") > > which produces a list with only one element, viz: > [[1]] > [1] "3" "6" "10" > > as.numeric() doesn't like that either. > > Clearly: 1) I cannot be the first person to attempt this, and 2) I've made > this WAY harder than it is. > > Would some kind soul please instruct me (and perhaps subsequent searchers) > how to convert the elements of a string into numbers?
3) you're almost there, just not realizing it: > x <- "3,6,10" > as.numeric(strsplit(x,split = ",")[[1]]) [1] 3 6 10 or for that matter > scan(textConnection(x), sep=",") Read 3 items [1] 3 6 10 although that leaves you with a dangling open connection. -- O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
