Re: st: confidence intervals histograms

[Roger Newson <roger.newson@kcl.ac.uk>]

At 17:59 15/02/2005, Richard Lenhardt wrote:
> Hello
>
> May I ask if anyone knows if there is an easy way to create graphs with
> confidence intervals displayed on top of histogram bars?
Yes. Use the -eclplot- package, downloadable from SSC (using the -ssc- 
command).

If you have a dataset with 1 observation per confidence interval and data 
on estimates in the variable -estimate-, confidence limits in variables 
-min95- and -max95-, and another variable -x- against which the confidence 
limits must be plotted, then you can type

eclplot estimate min95 max95 x, eplottype(bar)

which should produce a bar chart with the bars equal in height to the 
estimates and confidence intervals displayed on top of the bars.

If you do not know how to make such a dataset in the first place (with 1 
observation per confidence interval), then you should probably use the 
-parmest- package, also downloadable from SSC, to produce such a dataset 
from estimation results. A few papers and presentations on the use of 
-eclplot- and -parmest- can be downloaded from my website (see my signature 
below), either by using a browser or from within Web-aware Stata by typing

net from http://phs.kcl.ac.uk/rogernewson/

which takes you to my website. My presentation "From datasets to 
resultssets in Stata", given at the 10th UK Stata User Meeting in 2004, is 
the most up-to-date work on the subject available there.

I hope this helps.

Best wishes

Roger



--
Roger Newson
Lecturer in Medical Statistics
Department of Public Health Sciences
King's College London
5th Floor, Capital House
42 Weston Street
London SE1 3QD
United Kingdom

Tel: 020 7848 6648 International +44 20 7848 6648
Fax: 020 7848 6620 International +44 20 7848 6620
  or 020 7848 6605 International +44 20 7848 6605
Email: roger.newson@kcl.ac.uk
Website: http://phs.kcl.ac.uk/rogernewson/

Opinions expressed are those of the author, not the institution.

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