On Sun, 19 Feb 2006, Evgeniy Kachalin wrote: > Hello, dear R users. > > What is the easiest and the most visualli understandable way to analize > dependency of numerical variable on two factors?
interaction.plot() is a good start. > Is the > boxplot(y~f1+f2) the good way? It seems that this formula does not work. No, nor is it documented to: the help page is there to help you. You need a single factor as the grouping, so make one via an interaction. boxplot(y ~ f1:f2) should work. E.g. library(MASS) boxplot(FL ~ sex:sp, data=crabs) Another idea is to use lattice's bwplot. E.g. library(lattice) bwplot(FL ~ sex | sp, data=crabs) -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [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
