lme4 (version 1.0-6)

mkReTrms: Create Z, Lambda, Lind, etc.

Description

From the result of findbars applied to a model formula and and the evaluation frame, create the model matrix, etc. associated with random-effects terms. See the description of the returned value for a detailed list.

Usage

mkReTrms(bars, fr)

Arguments

bars

a list of parsed random-effects terms

fr

a model frame in which to evaluate these terms

Value

• a list with components
• Zt
  transpose of the sparse model matrix for the random effects
• Lambdat
  transpose of the sparse relative covariance factor
• Lind
  an integer vector of indices determining the mapping of the elements of the theta to the "x" slot of Lambdat
• theta
  initial values of the covariance parameters
• lower
  lower bounds on the covariance parameters
• flist
  list of grouping factors used in the random-effects terms
• cnms
  a list of column names of the random effects according to the grouping factors

See Also

Other utilities: findbars, mkRespMod, nlformula, nobars, subbars