[R] Functions in R like lincom and nlcom of Stata
tlumley at u.washington.edu
Sun Dec 14 20:10:25 CET 2008
On Sun, 14 Dec 2008, John Fox wrote:
> Dear Stas and David,
> A couple of people have mentioned linear.hypothesis() in the car package,
> which has methods for several kinds of models and a default method that will
> work for any model that responds to coef() and vcov(). The delta.method()
> function in the alr3 package is similarly general.
Despite its name, svycontrast() in the survey package also works for anything with coef() and vcov() methods, for both linear and nonlinear combinations.
Thomas Lumley Assoc. Professor, Biostatistics
tlumley at u.washington.edu University of Washington, Seattle
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