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st: New version of somersd on SSC


From   "Newson, Roger B" <r.newson@imperial.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: New version of somersd on SSC
Date   Tue, 5 Aug 2008 10:33:33 +0100

Thanks to Kit Baum, a new version of the somersd package is now
available for download from SSC. In Stata, use the ssc command to do
this.

The somersd package is described as below on my website. The new version
is a minor maintenance update, in which a few corrections have been made
to the online help, and all Mata programs have been updated to Stata
Version 10. The main change is that, in the ado-files, all calls to  the
obsolete and unpublicized input() function have now been replaced with
calls to the strpos() function, for which the online help can be
accessed by typing

whelp strpos()

in Stata.

The old index() function has long been unpublicized, and was temporarily
removed from at least one early sub-version of Stata Version 10, causing
the previous version of somersd to fail under that sub-version of Stata
10. I would like to thank Kim Goldsmith of the MRC Biostatistics Unit,
Cambridge University, UK for drawing my attention to this problem.

Best wishes

Roger


Roger B Newson
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: www.imperial.ac.uk/nhli/r.newson/
Departmental Web page:
http://www1.imperial.ac.uk/medicine/about/divisions/nhli/respiration/pop
genetics/reph/

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

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

TITLE
      somersd: Kendall's tau-a, Somers' D and percentile slopes

DESCRIPTION/AUTHOR(S)
      The somersd package contains the programs somersd, censlope and
cendif,
      which calculate confidence intervals for a range of parameters
behind
      rank or "nonparametric" statistics. somersd calculates confidence
      intervals for generalized Kendall's tau-a or Somers' D parameters,
      and stores the estimates and their covariance matrix as estimation
results.
      It can be used on left-censored, right-censored, clustered and/or
      stratified data. censlope is an extended version of somersd, which
also
      calculates confidence limits for the generalized Theil-Sen median
slopes
      (or other percentile slopes) corresponding to the version of
Somers' D
      or Kendall's tau-a estimated. cendif is an easy-to-use program to
      calculate confidence intervals for Hodges-Lehmann median
differences
      (or other percentile differences) between two groups. The somersd
package
      can be used to calculate confidence intervals for a wide range of
      rank-based parameters, which are special cases of Kendall's tau-a,
      Somers' D or percentile slopes. These parameters include
differences
      between proportions, Harrell's c index, areas under receiver
operating
      characteristic (ROC) curves, differences between Harrell's c
indices or
      ROC areas, Gini coefficients, population attributable risks,
median
      differences, ratios, slopes and per-unit ratios, and the
parameters
      behind the sign test and the Wilcoxon-Mann-Whitney or
Breslow-Gehan
      ranksum tests. Full documentation of the programs (including
methods and
      formulas) can be found in the manual files somersd.pdf,
censlope.pdf and
      cendif.pdf, which can be viewed using the Adobe Acrobat Reader.
      
      Author: Roger Newson
      Distribution-date: 04August2008
      Stata-version: 10
      

INSTALLATION FILES                                  (click here to
install)
      cendif.ado
      censlope.ado
      somers_p.ado
      somersd.ado
      _bcsf_bisect.mata
      _bcsf_bracketing.mata
      _bcsf_regula.mata
      _bcsf_ridders.mata
      _blncdtree.mata
      _somdtransf.mata
      _u2jackpseud.mata
      _v2jackpseud.mata
      blncdtree.mata
      tidot.mata
      tidottree.mata
      lsomersd.mlib
      cendif.sthlp
      censlope.sthlp
      censlope_iteration.sthlp
      mf_bcsf_bracketing.sthlp
      mf_blncdtree.sthlp
      mf_somdtransf.sthlp
      mf_u2jackpseud.sthlp
      somersd.sthlp
      somersd_mata.sthlp

ANCILLARY FILES                                     (click here to get)
      cendif.pdf
      censlope.pdf
      somersd.pdf
------------------------------------------------------------------------
-----------------------------
(click here to return to the previous screen)

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