ntyson at clovermail.net
2009-Oct-22 06:36 UTC
[R] Converting a Vector into a 2-level Factor
Hello Everyone, Let's say I have a vector as follows: vowels = c("aa", "aa", "ah", "ao", "eh) I want to make a factor consisting of two levels: the things that are "aa" and those that are not "aa". How would I do that? I tried using factor(vowels, levels=c("aa", "~aa"), exclude=NULL), but this gives me '<NA>' or missing values, which is not what I want. If there is no way to get two levels, then how do I convert the NAs to another symbol of my choosing? Any suggestions are welcome. Thanks.
Try this; factor(vowels == "aa", labels = c("aa", "~aa")) On Thu, Oct 22, 2009 at 4:36 AM, <ntyson at clovermail.net> wrote:> Hello Everyone, > > Let's say I have a vector as follows: > > vowels = c("aa", "aa", "ah", "ao", "eh) > > I want to make a factor consisting of two levels: the things that are "aa" > and those that are not "aa". ?How would I do that? > > I tried using factor(vowels, levels=c("aa", "~aa"), exclude=NULL), but this > gives me '<NA>' or missing values, which is not what I want. ?If there is no > way to get two levels, then how do I convert the NAs to another symbol of my > choosing? > > Any suggestions are welcome. > > Thanks. > > ______________________________________________ > R-help at r-project.org 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. >-- Henrique Dallazuanna Curitiba-Paran?-Brasil 25? 25' 40" S 49? 16' 22" O