I don't get the point. ?by says: FUN a function to be applied to data frame subsets of data.
It doesn't say FUN can be a character, and by(iris, iris$Species, summary) works as expected. Andy > From: Gabor Grothendieck > > I noticed that, unlike similar functions, 'by' does not use > match.fun, e.g. > > > by(iris, iris$Species, "summary") > Error in FUN(X[[1]], ...) : couldn't find function "FUN" > > The 'by' code should have an initial line of: > > FUN <- match.fun(FUN) > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > > > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
