bread.glmmTMB: Bread Matrix for Sandwich Estimator

In glmmTMB: Generalized Linear Mixed Models using Template Model Builder

Bread Matrix for Sandwich Estimator

Description

This method for bread returns the variance-covariance matrix (bread) for a fitted glmmTMB model.

Usage

## S3 method for class 'glmmTMB'
bread(x, full = FALSE, rawnames = FALSE, ...)

Arguments

x	a fitted glmmTMB object.
full	return a full variance-covariance matrix?
rawnames	logical; if TRUE, return the raw names of the parameters as in the TMB object. By default, FALSE such that the names are sanitized to user friendly names.
...	ignored additional arguments (only for methods compatibility).

Value

The bread matrix, which is just the variance-covariance matrix.

Examples

m <- glmmTMB(count ~ mined + (1 | spp), data = Salamanders, family = nbinom1)
bread(m)
bread(m, full = TRUE)

glmmTMB documentation built on Jan. 15, 2026, 9:07 a.m.