Description

The QV Calculator computes quasi-variances for estimates of a group or factor effect in a generalized linear model (including linear models, logistic regression, log linear models, hazard models, etc.) It can be used either in conjunction with R (as contributed package qvcalc) or Xlisp-Stat on a PC, Mac or Unix computer, or remotely through a web-based input form.

Documentation

Documentation is vailable at two levels of detail:

1. a brief description of the methodology, for users of the web-based QV Calculator
2. a more complete manual, "Quasi-variances in Xlisp-Stat and on the Web", intended mainly for those who use the QV Calculator in conjunction with Xlisp-Stat on their own computer. Cite as: Firth, D (2000), Quasi-variances in Xlisp-Stat and on the web, Journal of Statistical Software 5.4, 1-13.

The R package qvcalc comes with its own documentation.

Download

For use with R:

For use with Xlisp-Stat:

• qvcalc.lsp (36k)

After downloading qvcalc.lsp simply Load it into Xlisp-Stat to make available the QV Calculator.

The ship-damage example discussed in the documentation is in a separate file:

• example.lsp (8k)

© David Firth, 1999. This software carries ABSOLUTELY NO WARRANTY: feel free to use it, but use it at your own risk!

Related links:

• CRAN (for R)
• Xlisp-Stat
• David's home page