This should do it: df <- data.frame(a=character(0), b=character(0), stringsAsFactors=F)
because: typeof(factor(0)) is "integer" while: typeof(character(0)) is "character". Cheers, Jeff. On Wed, Oct 6, 2010 at 1:00 PM, N David Brown <hubd...@gmail.com> wrote: > Does anyone know why a data frame created with empty character columns > converts them to integer columns? > >> df<-data.frame(a=character(0),b=character(0)) >> df<-rbind(df,c("a","a")) >> typeof(df[1,1]) > [1] "integer" > > AsIs doesn't help: > >> df<-data.frame(a=I(character(0)),b=I(character(0))) >> df<-rbind(df,I(c("a","a"))) >> typeof(df[1,1]) > [1] "integer" > > Any suggestions on how to overcome this would be appreciated. > > Best wishes, > > David > > ______________________________________________ > 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. > ______________________________________________ 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.