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st: New version of the -bspline- package on SSC

From   Roger Newson <>
Subject   st: New version of the -bspline- package on SSC
Date   Tue, 10 Jun 2003 20:34:03 +0100

Fellow Statalisters

Thanks to Kit Baum (again), there is a new version of the -bspline- package available for download on SSC. In Stata, type -ssc desc bspline- to find out more, or see below.

The -bspline- package creates bases of B-splines or reference splines. The new version contains the same program as before, but now has a .pdf manual, including Methods and Formulas, and a help file that refers the user to the manual.

Best wishes


bspline: Create a basis of B-splines or reference splines

The bspline package contains the programs bspline and frencurv, which
generate bases of splines in an X-variable for inclusion in the
design matrix of a regression model. The program bspline generates a
basis of Schoenberg B-splines. The program frencurv ("French curve")
generates a basis of reference splines, spanning the same spline
space as the corresponding B-splines, but the fitted parameters
in the regression model corresponding to the reference splines are
simply values of the spline at reference points on the X-axis.
These parameters are easy for non-mathematicians to understand.
The user is allowed to specify the power of the spline, and also the
positions of the knots and/or reference points.
Full documentation of the program (including Methods and Formulas)
can be found in the ancillary file bspline.pdf, which can be viewed
using the Adobe Acrobat Reader.

Author: Roger Newson
Distribution-date: 10 June 2003
Stata-version: 6

INSTALLATION FILES (click here to install)

ANCILLARY FILES (click here to get)

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

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

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