Description Usage Arguments Details Value
Create all of the elements required to specify the random-effects structure of a mixed effects model.
1 | mkRanefRepresentation(grps, mms)
|
grps |
List of factor vectors of length n indicating groups. Each element corresponds to a random effects term. |
mms |
List of model matrices. Each element corresponds to a random effects term. |
The basic idea of this function is to call
Zsection
and blockLambdat
once
for each random effects term (ie. each list element in
grps
and mms
). The results of
Zsection
for each term are rBind
ed
together. The results of blockLambdat
are
bdiag
ed together, unless all terms have only a
single column ('predictor') in which case a diagonal matrix
is created directly.
A list
with:
Lambdat
Transformed relative covariance factor
Zt
Transformed random effects model matrix
theta
Vector of covariance parameters
lower
Vector
of lower bounds on the covariance parameters
upper
Vector of upper bounds on the covariance
parameters
thfun
A function that maps
theta
onto the non-zero elements of Lambdat
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