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Re: st: confidence intervals histograms


From   Roger Newson <roger.newson@kcl.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: confidence intervals histograms
Date   Tue, 15 Feb 2005 18:19:05 +0000

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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