Kjetil Brinchmann Halvorsen wrote: > P Ehlers wrote: > >> I'd like to add two comments to Martin's sensible response. >> >> 1. I've seen several intro-stats textbooks that define a >> boxplot to have whiskers to the extreme data values >> and then define Tukey's boxplot as a "modified" boxplot. >> I wish authors wouldn't do that. >> >> 2. I've also seen boxplots used for sample sizes as small >> as -- are you ready for it? -- n = 2!! (Admittedly, only in >> plots comparing several groups.) The help page for >> stripchart() points out that stripcharts "are a good >> alternative to boxplots when sample sizes are small". >> My own rule-of-thumb: n > 20 for single boxplots, n > 12 >> for multiple boxplots. > > > Woul've it make sense to have an option to replace boxes with dotplots > for only those groups with number of observations lesser tahn nmin=20 (say) > > Kjetil > [snip]
Probably best just to leave it up to the user. Peter Ehlers ______________________________________________ [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
