Hi You could instead of selecting columns by name select them by number Something like your.data[,2:3] <- do.call(data.frame, lapply(your.data[,2:3], factor))
or you could construct a vector of column numbers x <- c(2,3) Cheers Petr -----Original Message----- From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Saif Tauheed Sent: Tuesday, April 10, 2018 12:49 PM To: Eric Berger <ericjber...@gmail.com> Cc: r-help@r-project.org Subject: Re: [R] convert numeric variables to factor Thank you very much. After that I have the following error: cols<- c("GrMM", "RELG", "CASTE1", "SECTOR", "SECTOR4","AGE", "MARITAL", "JOBSTATUS", "ENG", "EDU", "PARENT_EDU", "MASSMEDIA_F", "MASSMEDIA_M", "HomeComputer", "HomeInternet") > for (I in cols) {data.frame[,i]= as.factor(data.frame[,i])} Error in sort.list(y) : 'x' must be atomic for 'sort.list' Have you called ‘sort’ on a list? > On 10-Apr-2018, at 3:12 PM, Eric Berger <ericjber...@gmail.com> wrote: > > You are missing a comma between "MARITAL" and "JOBSTATUS". > > On Tue, Apr 10, 2018 at 10:27 AM, Saif Tauheed <saif.tauh...@gmail.com > <mailto:saif.tauh...@gmail.com>> wrote: > I run this command for converting the numerical variable into factor. > However, I get the following error message. > > > cols<- c(“GrMM", "RELG", "CASTE1", "SECTOR", "SECTOR4","AGE", > > "MARITAL" "JOBSTATUS", "ENG", "EDU", "PARENT_EDU", "MASSMEDIA_F", > > "MASSMEDIA_M", "HomeComputer", "HomeInternet") for (i in cols) > > {data.frame[,i]= as.factor(data.frame[,i])} > > > Error: unexpected string constant in “cols<- c(“GrMM", "RELG", "CASTE1", > "SECTOR", "SECTOR4","AGE", "MARITAL" "JOBSTATUS"" > > Please help. > > Regards > Afzal > > > > On 10-Apr-2018, at 12:14 AM, Rui Barradas <ruipbarra...@sapo.pt > > <mailto:ruipbarra...@sapo.pt>> wrote: > > > > Hello, > > > > Though Bert's and David's answers are what you should do, note that some R > > functions that need factors will coerce their input variables when > > necessary. > > Have you tried to run the code you haven't posted without coercing to > > factor? It might run... > > > > Hope this helps, > > > > Rui Barradas > > > > On 4/9/2018 6:11 PM, David L Carlson wrote: > >> Try the help files: > >> ?factor > >> ---------------------------------------- > >> David L Carlson > >> Department of Anthropology > >> Texas A&M University > >> College Station, TX 77843-4352 > >> -----Original Message----- > >> From: R-help <r-help-boun...@r-project.org > >> <mailto:r-help-boun...@r-project.org>> On Behalf Of Saif Tauheed > >> Sent: Monday, April 9, 2018 11:29 AM > >> To: r-help@r-project.org <mailto:r-help@r-project.org> > >> Subject: Re: [R] convert numeric variables to factor Dear Sir, I > >> have xlsx data set which I have imported to R studio. Now some of the > >> variables are defined as numeric but I want define them as factor variable > >> so that I run classification algorithm in R. > >> Please to covert the variables. > >> Thanks and Regards > >> Abu Afzal > >> PhD Eco > >> JNU > >> India > >> ______________________________________________ > >> R-help@r-project.org <mailto:R-help@r-project.org> mailing list -- > >> To UNSUBSCRIBE and more, see > >> https://stat.ethz.ch/mailman/listinfo/r-help > >> <https://stat.ethz.ch/mailman/listinfo/r-help> > >> PLEASE do read the posting guide > >> http://www.R-project.org/posting-guide.html > >> <http://www.r-project.org/posting-guide.html> > >> and provide commented, minimal, self-contained, reproducible code. > >> ______________________________________________ > >> R-help@r-project.org <mailto:R-help@r-project.org> mailing list -- > >> To UNSUBSCRIBE and more, see > >> https://stat.ethz.ch/mailman/listinfo/r-help > >> <https://stat.ethz.ch/mailman/listinfo/r-help> > >> PLEASE do read the posting guide > >> http://www.R-project.org/posting-guide.html > >> <http://www.r-project.org/posting-guide.html> > >> and provide commented, minimal, self-contained, reproducible code. > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org <mailto:R-help@r-project.org> mailing list -- To > UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help > <https://stat.ethz.ch/mailman/listinfo/r-help> > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > <http://www.r-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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. ________________________________ Tento e-mail a jakékoliv k němu připojené dokumenty jsou důvěrné a jsou určeny pouze jeho adresátům. 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