ranef.glmmTMB: Extract Random Effects

In glmmTMB: Generalized Linear Mixed Models using Template Model Builder

Extract Random Effects

Description

Extract random effects from a fitted glmmTMB model, both for the conditional model and zero inflation.

Usage

## S3 method for class 'glmmTMB'
ranef(object, condVar = TRUE, ...)

## S3 method for class 'ranef.glmmTMB'
as.data.frame(x, ...)

## S3 method for class 'glmmTMB'
coef(object, condVar = FALSE, ...)

Arguments

object	a glmmTMB model.
condVar	whether to include conditional variances in result.
...	some methods for this generic function require additional arguments (they are unused here and will trigger an error)
x	a ranef.glmmTMB object (i.e., the result of running ranef on a fitted glmmTMB model)

Value

• For ranef, an object of class ranef.glmmTMB with two components:

  cond

  a list of data frames, containing random effects for the conditional model.

  zi

  a list of data frames, containing random effects for the zero inflation.

  disp

  a list of data frames, containing random effects for the dispersion model.

  If condVar=TRUE, the individual list elements within the cond, zi, and disp components (corresponding to individual random effects terms) will have associated condVar attributes giving the conditional variances of the random effects values. These are in the form of three-dimensional arrays: see ranef.merMod for details. The only difference between the packages is that the attributes are called ‘postVar’ in lme4, vs. ‘condVar’ in glmmTMB.

• For coef.glmmTMB: a similar list, but containing the overall coefficient value for each level, i.e., the sum of the fixed effect estimate and the random effect value for that level. Conditional variances are not yet available as an option for coef.glmmTMB.

• For as.data.frame: a data frame with components

  component

  part of the model to which the random effects apply (conditional or zero-inflation)

  grpvar

  grouping variable

  term

  random-effects term (e.g., intercept or slope)

  grp

  group, or level of the grouping variable

  condval

  value of the conditional mode

  condsd

  conditional standard deviation

Note

When a model has no zero inflation, the ranef and coef print methods simplify the structure shown, by default. To show the full list structure, use print(ranef(model),simplify=FALSE) or the analogous code for coef. In all cases, the full list structure is used to access the data frames, see example.

See Also

fixef.glmmTMB.

Examples

if (requireNamespace("lme4")) {
   data(sleepstudy, package="lme4")
   model <- glmmTMB(Reaction ~ Days + (1|Subject), sleepstudy)
   rr <- ranef(model)
   print(rr, simplify=FALSE)
   ## extract Subject conditional modes for conditional model
   rr$cond$Subject
   as.data.frame(rr)
}

glmmTMB documentation built on Sept. 30, 2024, 9:34 a.m.