mkRanefRepresentation: Make random effects representation

In lme4/lme4pureR: lme4 in pure R

Description

Create all of the elements required to specify the random-effects structure of a mixed effects model.

Usage

mkRanefRepresentation(grps, mms)

Arguments

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.

Details

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 rBinded together. The results of blockLambdat are bdiaged together, unless all terms have only a single column ('predictor') in which case a diagonal matrix is created directly.

Value

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

lme4/lme4pureR documentation built on May 21, 2019, 7:34 a.m.