Initialize.reStruct {nlme} | R Documentation |
Initial estimates for the parameters in the pdMat
objects
forming object
, which have not yet been initialized, are
obtained using the methodology described in Bates and Pinheiro
(1998). These estimates may be refined using a series of EM
iterations, as described in Bates and Pinheiro (1998). The number of
EM iterations to be used is defined in control
.
## S3 method for class 'reStruct': Initialize(object, data, conLin, control, ...)
object |
an object inheriting from class reStruct ,
representing a random effects structure and consisting of a list of
pdMat objects. |
data |
a data frame in which to evaluate the variables defined in
formula(object) . |
conLin |
a condensed linear model object, consisting of a list
with components "Xy" , corresponding to a regression matrix
(X ) combined with a response vector (y ), and
"logLik" , corresponding to the log-likelihood of the
underlying model. |
control |
an optional list with a single component niterEM
controlling the number of iterations for the EM algorithm used to
refine initial parameter estimates. It is given as a list for
compatibility with other Initialize methods. Defaults to
list(niterEM = 20) . |
... |
some methods for this generic require additional arguments. None are used in this method. |
an reStruct
object similar to object
, but with all
pdMat
components initialized.
Jose Pinheiro Jose.Pinheiro@pharma.novartis.com and Douglas Bates bates@stat.wisc.edu
Bates, D.M. and Pinheiro, J.C. (1998) "Computational methods for multilevel models" available in PostScript or PDF formats at http://franz.stat.wisc.edu/pub/NLME/