https://github.com/cran/sandwich
Tip revision: b52505df1b7c2f97f616710b75ee27773d3ffd05 authored by Achim Zeileis on 13 April 2007, 00:00:00 UTC
version 2.0-2
version 2.0-2
Tip revision: b52505d
NEWS
Changes in Version 2.0-2
o Added new vcovOPG() function for computing the outer
product of gradients estimator (works for maximum
likelihood estfun() methods only).
o Scaled estfun() and bread() method for "glm" objects
by dispersion estimate. Hence, this corresponds to
maximum likelihood and not deviance methods.
Changes in Version 2.0-1
o Minor fix to bwAndrews() so that it can be easily used
in models for multivariate means.
Changes in Version 2.0-0
o A paper based on the "sandwich-OOP" vignette was accepted
for publication in volume 16(9) of Journal of Statistical
Software at
http://www.jstatsoft.org/
o A NAMESPACE was added for the package.
Changes in Version 1.9-0
o The vignette "sandwich-OOP" has been revised, extended and
released as a technical report.
o Several estfun() methods and some of the meat() functions have
been enhanced and made more consistent.
Changes in Version 1.1-1
o estfun() methods now use directly the model.matrix() method
instead of the terms() and model.frame() methods.
Changes in Version 1.1-0
o sandwich is made object-oriented, so that various types
of sandwich estimators can be computed not only for "lm"
models, but also "glm", "survreg", etc.
To achieve object orientation this various changes have
been made: a sandwich() function is provided which needs
a bread and a meat matrix. For the bread, a generic bread()
function is provided, for the meat, there are meat(),
meatHC() and meatHAC(). All rely on the existence of a
estfun() method.
o vcovHC() and vcovHAC() have been restructured to use
sandwich() together with meatHC() and meatHAC(), respectively.
o A new vignette "sandwich-OOP" has been added, explaining
the new object-orientation features.
o Various methods to bread() and estfun() have been added,
particularly for "survreg" and "coxph".