You can use the bwplot panel in the HH package. You might need to install HH first, by uncommenting the line below.
girafe.txt <- textConnection( " day nmgml 1 29 2.72655 2 29 2.48820 3 15 2.85945 4 15 2.58915 5 15 2.88345 6 15 2.66675 7 47 3.29125 8 15 2.44085 9 29 2.43065 10 29 2.43425 11 29 2.42705 12 0 1.12350 13 15 5.10310 14 15 0.99880 15 0 2.22350 16 47 2.18290 17 47 2.21570 18 47 2.46450 19 29 2.53350 20 47 2.78550 21 47 3.06920 22 0 2.65660 23 0 2.16650 24 0 2.20620 25 0 1.91870 26 0 2.45160 27 0 2.35980 28 0 1.99900 29 0 2.16300 30 15 2.00460 31 15 2.56220 32 47 2.38650 33 29 2.65820 34 29 2.47670 35 47 2.23770 36 29 2.40080 37 47 2.12650 38 29 2.35950") girafe <- read.table(girafe.txt, header=TRUE) close.connection(girafe.txt) ## install.packages(HH) ## if you don't already have it library(HH) girafe$day <- factor(girafe$day) position(girafe$day) <- as.numeric(levels(girafe$day)) bwplot(nmgml ~ day, data=girafe, scales=list(x=list(limits=c(-5, 53), at=position(girafe$day), labels=position(girafe$day))), box.width=5, panel=panel.bwplot.intermediate.hh) There is a bug in the lattice installed with R-2.11.0 that makes it ignore the limits argument. A repair is on r-forge now and will be released soon. The limits argument works correctly with R-2.10.1. Another example is on my website http://astro.temple.edu/~rmh/HH/bwplot-color.pdf [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.