Statalist


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

st: Use of pie charts


From   "Allan Reese (Cefas)" <allan.reese@cefas.co.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Use of pie charts
Date   Wed, 14 Oct 2009 15:11:20 +0100

I'd agree with all Nick's comments.  Piecharts are poor because they are
suitable only for very low data-density and because the perception
relies on comparing areas that are proxies for angles.  A notably bad
example recently in a newspaper had angles that were clearly not
proportional to the data.  I was able to reproduce the pies by adding a
column containing 100, rather than 100-x.  Try plotting
   20 100  /* for 20%
   30 100  /* for 30% etc

Wrote twice to the editor but got no response.

R Allan Reese
Senior statistician, Cefas
The Nothe, Weymouth DT4 8UB 

Tel: +44 (0)1305 206614 -direct
Fax: +44 (0)1305 206601 

www.cefas.co.uk 



***********************************************************************************
This email and any attachments are intended for the named recipient only.  Its unauthorised use, distribution, disclosure, storage or copying is not permitted.  If you have received it in error, please destroy all copies and notify the sender.  In messages of a non-business nature, the views and opinions expressed are the author's own and do not necessarily reflect those of the organisation from which it is sent.  All emails may be subject to monitoring.
***********************************************************************************


*
*   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   |   What's new   |   Site index