Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: st: box and whisker plot with proportional box size?


From   Ronan Conroy <rconroy@rcsi.ie>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: box and whisker plot with proportional box size?
Date   Thu, 2 Sep 2010 15:00:20 +0100

On 2 MFómh 2010, at 14:54, Jeph Herrin wrote:

A colleague has shown me a couple of box and whisker plots where
the width of the box (that is, the dimension that is perpindicular
to the whiskers) is proportionate to the number of observations the
box represents. I think it's a useful modification, and have been
trying to create this myself. However there seems to be no option
in -graph box- to control the width of the box.

While this seems like a useful option, it can rapidly result in illegible graphs and crowded axis labels in the presence of groups of widely differing sizes. JMP does it, and I keep the option turned off by default.

If you want to give an idea of the amount of data in each group, then superimposing this as text on the graph might be more efficient.

What always seemed to me to be a better idea was giving some sort of display of the actual data points with a boxplot superimposed, or a little to one side, as you can do with Nick Cox's -stripplot-. This shows more and, of course, gives a good impression of the density of data behind each boxplot.


Ronan Conroy
=================================

rconroy@rcsi.ie
Royal College of Surgeons in Ireland
Epidemiology Department,
Beaux Lane House, Dublin 2, Ireland
+353 (0)1 402 2431
+353 (0)87 799 97 95
+353 (0)1 402 2764 (Fax - remember them?)
http://rcsi.academia.edu/RonanConroy

P    Before printing, think about the environment





*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index