There is a kind of data I run into fairly often which I have never known how to represent in R, and nothing I've tried really satisfies me.
Consider for example ... - injuries ... - injuries to limbs ... - injuries to extremities ... - injuries to hands - injuries to dominant hand - injuries to non-dominant hand ... ... ... This isn't ordinal data, because there is no "left to right" order on the values. But there IS a "part/whole" order, which an analysis should respect, so it's not pure nominal data either. As one particular example, if I want to tabulate data like this, an occurrence of one value should be counted as an occurrence of *every* superordinate value. Examples of such data include "why is this patient being treated", "what drug is this patient being treated with", "what geographic region is this school from", "what biological group does this insect belong to". So what is the recommended way to represent and the recommended way to analyse such data in R? [[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.