Charles Berry <ccberry <at> ucsd.edu> writes: [snip] > > Katherine Gobin <katherine_gobin <at> yahoo.com> writes:
> > How to automatically identify and retain only one column (in this example > column x) among the identical > > columns besides other non-identical columns (viz. id, y and z). > > See > > ?unique > > Details > > This is a generic function with methods for vectors, *data frames* and ... > > [emphasis added] > > So, > > unique( df, MARGIN=2 ) > > is what you want. > My bad. Mea culpa, etc. There is a data.frame method, but it ignores the MARGIN arg. Better to stick with what David suggested: http://article.gmane.org/gmane.comp.lang.r.general/289881 HTH, ______________________________________________ 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.
