Quasi Variances for Factor Effects in Statistical Models

Functions to compute quasi variances and associated measures of approximation error.


Version history

This history starts with version 0.8-9 (3 February 2015). Earlier versions are not listed here.


(2017-09-18, submitted to CRAN)

Reorganised qvcalc as an S3 generic function, to allow others to provide class-specific methods.

The package includes method qvcalc.lm for linear and generalized linear models. The back-end computation is now done in qvcalc.default.

The method for BTabilities objects is now moved to the BradleyTerry2 package (version 1.0-8). Thanks go to Heather Turner for that.


(2016-03-30, on CRAN)

Minor tweaks to fix the dependencies NOTE on CRAN checks


(2015-02-03, on CRAN)

Corrects an error in the calculation of the relative errors for simple contrasts. The formula used for this now agrees with the definition of relative error that was given in the Biometrika paper. Many thanks to Shaun Killingbeck for spotting the error in version 0.8-8. Also made some small improvements to examples, and cosmetic changes to avoid a NOTE in the latest CRAN checks.

Reference manual

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0.9-1 by David Firth, a year ago


Browse source code at https://github.com/cran/qvcalc

Authors: David Firth

Documentation:   PDF Manual  

Task views: Statistics for the Social Sciences

GPL-2 | GPL-3 license

Suggests relimp, MASS

Enhances psychotools

Imported by BradleyTerry2, PlackettLuce, gnm, logmult.

Suggested by catdata.

See at CRAN