https://github.com/cran/sandwich
Tip revision: fe9cfbe9460fc94d3b41e6f36ff7fc932473c460 authored by Achim Zeileis on 15 February 2006, 00:00:00 UTC
version 1.1-1
version 1.1-1
Tip revision: fe9cfbe
NEWS
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".