Perfect. My headache is gone. Thanks. > -----Original Message----- > From: Henrique Dallazuanna [mailto:[EMAIL PROTECTED] > Sent: Thursday, March 27, 2008 12:50 PM > To: Doran, Harold > Cc: r-help@r-project.org > Subject: Re: [R] Recode factors > > If I understand, you can try this: > > levels(x)[is.na(as.numeric(levels(x)))] <- 0 > > On 27/03/2008, Doran, Harold <[EMAIL PROTECTED]> wrote: > > I know this comes up, but I didn't see my exact issue in > the archives. > > I have variables in a dataframe that need to be recoded. > Here is what > > I'm dealing with > > > > I have a factor called aa > > > > > class(aa) > > [1] "factor" > > > table(aa) > > aa > > * 0 1 2 3 A B C D L N T > > 0 0 1908 725 2089 0 0 67 0 0 2 1 6 > > > > I need to recode everything that is not a numeric value > into a 0. So, > > for example > > > > > mm <- ifelse(aa == 'B', 0, aa) > > > table(mm) > > mm > > 0 3 4 5 11 12 13 > > 67 1908 725 2089 2 1 6 > > > > The recoding works, but the values are no longer what they were > > previously. For example, what was a '1' is now a '4' etc. > Is there a > > way to recode factors and also keep the values the same as > they were before? > > That is, a '1' would remain a '1' after the recode? > > > > After the recoding, I need to convert to a numeric > variable. I can do > > this as > > > > mm <- as.numeric(as.character(aa)) > > > > Harold > > > > > > > sessionInfo() > > R version 2.6.2 (2008-02-08) > > i386-pc-mingw32 > > > > locale: > > LC_COLLATE=English_United States.1252;LC_CTYPE=English_United > > States.1252;LC_MONETARY=English_United > > States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252 > > > > attached base packages: > > [1] stats graphics grDevices utils datasets > methods base > > > > > > other attached packages: > > [1] gdata_2.4.0 > > > > loaded via a namespace (and not attached): > > [1] gtools_2.4.0 > > > > > > > ______________________________________________ > > 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. > > > > > -- > Henrique Dallazuanna > Curitiba-Paraná-Brasil > 25° 25' 40" S 49° 16' 22" O >
______________________________________________ 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.
