Thank you, Duncan. So isn't it possible to add labels to a variable with numeric values 0/1? This kind of variable is very useful for logistic regression, for example, but I'd rather have its categories labelled. Angel
________________________________ De: Duncan Murdoch [mailto:murdoch.dun...@gmail.com] Enviado el: vie 19/09/2014 13:32 Para: Angel Rodriguez; r-help@r-project.org Asunto: Re: [R] See the numeric codes of a factor On 19/09/2014, 6:53 AM, Angel Rodriguez wrote: > Dear Subscribers, > > I want to label a numeric variable 0="Bad" /1="Good". I understand the only > way is to transform it into a factor variable. > > Is there a way to check that the numeric values of the new factor variable > are 0 and 1 and not 1 and 2? If you apply as.numeric() to a factor, you won't get a zero value. Internal factor values start at 1. So I wouldn't rely on the internal storage to achieve whatever it is you want to achieve. Use explicit computation, e.g. words <- ifelse(var == 0, "Bad", ifelse(var == 1, "Good", NA)) values <- ifelse(words == "Bad", 0, ifelse(words == "Good", 1, NA)) Duncan Murdoch [[alternative HTML version deleted]] ______________________________________________ R-help@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.
