Of course I left out the "data" argument: boxplot(Result ~ Chemical, data= yourdat,subset=yourdat$Chemical %in% c("Ca","Cl", "Cond","Mg","Na","SO2","TDS"))
-- Bert On Wed, Nov 2, 2011 at 10:08 AM, Bert Gunter <bgun...@gene.com> wrote: > To make such a plot, I would have thought your want your data structure to > be: > > yourdat: > > Column A: Date > Column B; Chemical > Column C: Result > .... > > After subsetting this to the chemicals you want or doing the subsetting in > your plot command, something like (base R) > > boxplot(Result ~ Chemical, subset=yourdat$Chemical %in% c("Ca","Cl", > "Cond","Mg","Na","SO2","TDS")) > > You probably can get what you want one way or the other with your current > data structure -- though you may have to use ggplot or trellis -- but it > does appear to be inconvenient. > > Whether I'm correct or not in my understanding of your situation, an > important message is: you should choose your data structure to facilitate > the analysis that you have in mind. IMHO, this is one of R's great > strengths: it provides rich facilities for manipulating data tightly > integrated with plotting and analytical capabilities. > > Cheers, > Bert > > On Wed, Nov 2, 2011 at 9:46 AM, Rich Shepard <rshep...@appl-ecosys.com>wrote: > >> On Wed, 2 Nov 2011, Rich Shepard wrote: >> >> I want a subset of this with only 7 chemicals: Ca, Cl, Cond, Mg, Na, >>> SO4, >>> and TDS. >>> >> >> I should have also written that what I ultimately want is to create a >> box-and-whisker plot for these 7 chemicals in a single panel. If that can >> be >> done directly from the source data frame without creating another subset, >> I >> want to learn the syntax for that. >> >> Rich >> >> ______________________________**________________ >> R-help@r-project.org mailing list >> https://stat.ethz.ch/mailman/**listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help> >> PLEASE do read the posting guide http://www.R-project.org/** >> posting-guide.html <http://www.R-project.org/posting-guide.html> >> and provide commented, minimal, self-contained, reproducible code. >> > > > > -- > > Bert Gunter > Genentech Nonclinical Biostatistics > > Internal Contact Info: > Phone: 467-7374 > Website: > > http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm > > > -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm [[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.