Dear Felipe, Assuming you are not interested in the exact formulae that are used to calculate each of these, from top to bottom it is:
minimum, lower quartile, median, upper quartile, maximum If there are dots, these usually indicate outliers. Please read ?boxplot for more details on what R will do when. If you are interested in the specifics of the computations, read ?boxplot.stats Hope that helps, Josh See inline comments to match these things to your terms. On Tue, Sep 28, 2010 at 10:06 PM, Luis Felipe Parra <felipe.pa...@quantil.com.co> wrote: > > Hello, does somebody know in a boxplot, what does each element in the > boxplot represent? > > 1. lines at the extremes of the dotted lines? min and max (unless there are outliers AND you have not set range = 0) > 2. Extremes of the boxes lower & upper quartile > 3. Black line in the middle of the box? median > 4. notches? > > Thank you > > Felipe Parra > > [[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. -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ ______________________________________________ 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.
