On Aug 24, 2011, at 13:18 , Petr PIKAL wrote: > Hi >> >> Dear all, >> >> I have a dataset of 3 categorical factors, the mean and the standard >> deviation of each value. I want to use these values to plot a boxplot, >> grouped by each of the 3 categorical factors (24 boxplots in total). I >> don't have a clue on how to do the boxplot from mean and SD data already > calculated. > > I am afraid that you can not do it.
Or, you can't do it without modifying the definition of a boxplot. There are variations in which the box is mean +/- 2SD and the whiskers show the range, but I consider that a doubleplusungood idea -- box plots should be box plots! > Only if you you accept assumption that > distribution within each factor is normal and therefore median equals > mean. You can than also use 25 an 75 percentile for box construction. > > see ?boxplot and ?bxp for internals of plotting function. > > One possibility also is to generate values by mean and sd parameters to > rnorm, although I do not see the reason for doing it. > > Regards > Petr > > >> >> Thanks in advance >> >> >> [[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. > > ______________________________________________ > 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. -- Peter Dalgaard, Professor, Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd....@cbs.dk Priv: pda...@gmail.com "Døden skal tape!" --- Nordahl Grieg ______________________________________________ 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.
