pdgradient {lme4} | R Documentation |
This function is generic. It returns the gradient of the positive
definite matrix represented by x
with respect to the parameters
of x
.
pdgradient(x)
x |
An object of a suitable class, usually one of
the classes that inherit from pdMat . |
A numeric array of dimension c(dim(x), length(coef(x)))
that
is the gradient of the pdmatrix
represented by x
with
respect to the parameters of x
.
pdIdent
classpdLogChol
classpdMat
class, implemented
using pdgradNumeric
Douglas Bates bates@stat.wisc.edu and Saikat DebRoy saikat@stat.wisc.edu