Thanks. But in this specific case, I would like the output to include all three columns, including the "ignored" column (in this case, I'd like it to ignore column a).
Thanks, Andrew On 7/9/07, hadley wickham <[EMAIL PROTECTED]> wrote: > On 7/9/07, Andrew Yee <[EMAIL PROTECTED]> wrote: > > Take for example the following data.frame: > > > > a<-c(1,1,5) > > b<-c(3,2,3) > > c<-c(5,1,5) > > sample.data.frame<-data.frame(a=a,b=b,c=c) > > > > I'd like to be able to use unique(sample.data.frame), but have > > unique() ignore column a when determining the unique elements. > > > > However, I figured that this would be setting for incomparables=, but > > it appears that this funcationality hasn't been incorporated. Is > > there a work around for this, i.e. to be able to get unique to only > > look at selected columns of a data frame? > > unique(df[,c("a","c")]) ? > > Hadley > ______________________________________________ R-help@stat.math.ethz.ch 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.