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st: New package -xcontract- on SSC


From   Roger Newson <roger.newson@kcl.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   st: New package -xcontract- on SSC
Date   Mon, 04 Aug 2003 17:34:31 +0100

Fellow Statalisters

Thanks to Kit Baum, there is now a new package -xcontract- downloadable from SSC. In Stata, type -ssc desc xcontract- to find out more.

The -xcontract- package is described as below on my website. It is an extended version of -contract-, and is improved in 3 ways. First, it calculates percents. Second, it is byable (calculating percents within by-groups if -by ... :- is specified). Third, it gives the user more choice about the destination of the output data set, with the options of listing it to the Stata log, saving it to a disk file, or writing it to the memory (overwriting the original data set).

Just recently, there have been a few postings on Statalist, indicating that quite a few users could use a package like -xcontract- for creating publication-ready tables of frequencies and percents. The output data set produced by -xcontract- can be converted to a form that can be cut and pasted into a word processor such as Microsoft Word, or into a TeX, LaTeX or HTML document, using the -listtex- package, downloadable from SSC (or in a Stata 7 version from my website). This might be done after reprocessing the output data set using various other packages, such as -tostring- and -ingap- (also downloadable from SSC) and -reshape- (part of official Stata). More about the use of these packages to create publication-ready tables can be found in Newson (2003), due to appear in The Stata Journal, but also downloadable from my website at
http://www.kcl-phs.org.uk/rogernewson/
either using a browser or using the Stata -net- command.

Best wishes

Roger

References

Newson R. Confidence intervals and p-values for delivery to the end user. The Stata Journal 2003, in press.


------------------------------------------------------------------------------------------------------------------------
package xcontract from http://www.kcl-phs.org.uk/rogernewson/stata8
------------------------------------------------------------------------------------------------------------------------

TITLE
xcontract: Make data set of frequencies and percents on disk or in memory

DESCRIPTION/AUTHOR(S)
xcontract is an extended version of contract. It creates a data set with one
observation per combination of values of a list of variables in the existing
data set and new variables containing the frequency and percent of each
combination, and, optionally, the cumulative frequency and percent of each
combination. By-variables can be used with xcontract, and the percents
will then be calculated within by-groups. The output data set may either be
listed to the Stata log, or saved to a disk file, or written to the memory
(overwriting any existing data set).

Author: Roger Newson
Distribution-Date: 04august2003
Stata-Version: 8

INSTALLATION FILES (click here to install)
xcontract.ado
xcontract.hlp
------------------------------------------------------------------------------------------------------------------------

--
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://www.kcl-phs.org.uk/rogernewson

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

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