Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

Re: st: Scatter graph with error "whiskers"?


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Scatter graph with error "whiskers"?
Date   Thu, 15 Nov 2007 20:29:36 +0000 (GMT)

--- Arnold.Levinson@UCHSC.edu wrote:
> I have created a summary data set with estimates (by year) and lower
> / upper bound variables for each estimate. In either v 9 or v 10, can
> y-error bars (whiskers) be added to a scatter plot? I've looked
> through help and can't find the answer, although I might have missed
> something. 

You are probably looking for -twoway rcap-, see -help twoway rcap- and
the example below:

*---------------- begin example ------------
sysuse auto, clear
collapse (mean)  mean=mpg   /*
      */ (sd)    sd=mpg     /*
      */ (count) N=mpg, by(rep78)
gen df = N-1
gen lb = mean - invttail(df,.025)*sd
gen ub = mean + invttail(df,.025)*sd

twoway scatter mean rep78 || /*
    */ rcap lb ub rep78
*------------- end example -------------------
(For more on how to use examples I sent to the Statalist, see
http://home.fsw.vu.nl/m.buis/stata/exampleFAQ.html )

Hope this helps,
Maarten

-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


      ___________________________________________________________ 
Want ideas for reducing your carbon footprint? Visit Yahoo! For Good  http://uk.promotions.yahoo.com/forgood/environment.html
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   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