try ?expand.grid boxplot formula can take can be like >boxplot(V~Groupe) ----- Message d'origine ---- De : Bernd Dittmann À : r-help@stat.math.ethz.ch Envoyé le : Samedi, 15 Avril 2006, 7h26mn 47s Objet : [R] manual construction of box&whisker plot Dear useRs, how can I construct a box&whisker plot based on the vector "fivenum"? The challenge I face is as follow: I have a table such as x | fivenum --------------- ... | (.....) ... | (.....) and so forth.... For each observation x I have generated a vector containing the fivenum estimates. The first challenge is to group my fivenum vectors into groups based on a selection criterion of x, say for 0 < x < 6, all fivenum vectors would be collected in that group. Once all my fivenum vectors are in their respective groups, I wish to generate a b&w plot for each group. How could I possibly do that? Also, what would be the most convenient approach. Looking forward to your suggestions. Many thanks in advance! Sincerely, Bernd Dittmann ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html [[alternative HTML version deleted]]