st: New version of -xcollapse- on SSC

[Roger Newson <r.newson@imperial.ac.uk>]

Thanks to Kit Baum, a new version of the -xcollapse- package is now 
available for download from SSC. In Stata, use the -ssc- command to do 
this, or -adoupdate- if you already have an old version.

The -xcollapse- package is an extended version of -collapse-, and is 
described as below on my website. The new version has been updated to 
Stata Version 10 (with a .sthlp help file), and now compresses the 
generated output variables to the lowest storage type possible without 
loss of precision. It also has a -float- option, specifying that 
generated output variables of type -double- will be recast to type 
-float-, even if this causes loss of precision.

Users of Stata Versions 9, 8 or 7 can still download the Stata 8 or 7 
versions of -xcollapse- from my website by typing in Stata

net from "http://www.imperial.ac.uk/nhli/r.newson/";

and selecting the Stata version required.

Best wishes

Roger


--
Roger B Newson BSc MSc DPhil
Lecturer in Medical Statistics
Respiratory Epidemiology and Public Health Group
National Heart and Lung Institute
Imperial College London
Royal Brompton Campus
Room 33, Emmanuel Kaye Building
1B Manresa Road
London SW3 6LR
UNITED KINGDOM
Tel: +44 (0)20 7352 8121 ext 3381
Fax: +44 (0)20 7351 8322
Email: r.newson@imperial.ac.uk
Web page: http://www.imperial.ac.uk/nhli/r.newson/
Departmental Web page:
http://www1.imperial.ac.uk/medicine/about/divisions/nhli/respiration/popgenetics/reph/

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

------------------------------------------------------------------------------------
package xcollapse from http://www.imperial.ac.uk/nhli/r.newson/stata10
------------------------------------------------------------------------------------

TITLE
      xcollapse: Make data set of summary statistics on disk or in memory

DESCRIPTION/AUTHOR(S)
      xcollapse is an extended version of collapse, which 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 summary statistics 
of other
      variables (eg means) in each combination. xcollapse allows the 
user to choose
      the destination of the output data set, which 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: 05may2010
      Stata-Version: 10

INSTALLATION FILES                                  (click here to install)
      xcollapse.ado
      xcollapse.sthlp
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(click here to return to the previous screen)
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