On Mar 20, 2015, at 2:20 PM, Antonio Silva wrote: > Hello > > I'm using a dataframe (mydata) where row names are sampling points and > column names are species in a multivariate analysis. > > If I write boxplot(mydata) I'll have boxplots for each species abundance in > alphabetical order. > > How to get the boxes orderer by the median? > > Usually for this I write > boxplot(value~category,at=rank(tapply(mydata$value,mydata$category,median)))
I would not have expected that to succeed. The usual approach is to change the order of factor levels before the call to boxplot. > but for this to work I need a column for the categories and another column > for the values. Yes. That is the usual situation. Since you provide no data we cannot tell what is different about your case. > > Thanks in advance, best regards. > > Antonio Olinto > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. David Winsemius Alameda, CA, USA ______________________________________________ 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.
