table(unique(df)$PROJECT) On Tue, 2015-03-31 at 14:51 -0500, Walter Anderson wrote: > I have a data frame that shows all of the parks (including duplicates) > that are impacted by a projects 'footprint': > > PROJECT PARKNAME > A PRK A > A PRK B > A PRK A > B PRK C > B PRK A > C PRK B > C PRK D > ... > > What I need is a cross tabulation that shows me the number of unique > parks for each project. If I using the standard table(df$PROJECT) it > reports: > > A 3 > B 2 > C 2 > ... > > where I need it to ignore duplicates and report: > > A 2 > B 2 > C 2 > ... > > Anyone have any suggestions on how to do this within the R paradigm? > > Walter Anderson > > ______________________________________________ > 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.
______________________________________________ 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.
