Jon One way: assuming your data.frame is 'jon'
aggregate(jon[,2], list(jon[,1]), function(x) levels(x)[which.max(table(x))]) Group.1 x 1 Plot1 big 2 Plot2 small 3 Plot3 small HTH ........ Peter Alspach > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Thompson, Jonathan > Sent: Friday, 1 June 2007 7:26 a.m. > To: [email protected] > Subject: [R] Aggregate to find majority level of a factor > > I want to use the aggregate function to summarize data by a > factor (my field plots), but I want the summary to be the > majority level of another factor. > > > For example, given the dataframe: > > Plot1 big > Plot1 big > Plot1 small > Plot2 big > Plot2 small > Plot2 small > Plot3 small > Plot3 small > Plot3 small > > > My desired result would be: > Plot1 big > Plot2 small > Plot3 small > > > I can't seem to find a scalar function that will give me the > majority level. > > Thanks in advance, > > Jonathan Thompson > > ______________________________________________ > [email protected] 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. > ______________________________________________________ The contents of this e-mail are privileged and/or confidenti...{{dropped}} ______________________________________________ [email protected] 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.
