> From: Graham Williams > > Received Tue 04 Oct 2005 7:26pm +1000 from Karin Lagesen: > > > > I have read and reread the boxplot and the boxplot stats page, and I > > still cannot understand how and what boxplot shows. I realize that > > this might be due to me not knowing enough statistics, but anyway... > > > > First, how does boxplot determine the size of the box? And > is the line > > inside the box the mean or the median (or something completely > > different?) And how does it determine how long out the > whiskers should > > go? > > > > Also, the boxplot.stats page talks about "hinges", what are those? > > "The two "hinges" are versions of the first and third > quartile, i.e., > > close to 'quantile(x, c(1,3)/4)'." > > Wikipedia has a reasonable description > > http://en.wikipedia.org/wiki/Boxplot
... but not quite accurate. If I'm not mistaken, boxplots are based on Tukey's letter values. Here's one description of what they are: http://www.math.yorku.ca/SCS/Courses/eda/eda1.html#H2_32:1.2 Andy ______________________________________________ [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
