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...which the 476 are NA-filled. To find the interesting case, you need to go through the following contortions: > menar.t1 <- juul$menarche=="Yes"&juul$tanner=="I" > menar.t1 <- menar.t1 & !(is.na(menar.t1)) > juul[menar.t1,] age menarche sex igf1 tanner testvol 962 12.33 Yes F NA I NA I can't think of a single case where the current behavior is useful. Indexing with numerical NA's makes sense, e.g. when recoding, and then there's the boundary case of indexing with a vector where all elements are logical NA...

I want to make illustrations a la boxplot for a data material with several groups. Some of the groups are very small, so a boxplot doesn't make sense. I would like to use stripchart for these groups. On the other hand, some of the groups are very large, so for them stripchart isn't so good. So my question is: Is it possible to combine boxplots and and stripcharts in one figure? (Of course,