Skip to contents

Bread Matrix for Sandwich Estimator

Source: R/methods.R
bread.glmmTMB.Rd

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)
#>             (Intercept)     minedno
#> (Intercept)  0.07473625 -0.02159957
#> minedno     -0.02159957  0.02439405
bread(m, full = TRUE)
#>                   (Intercept)       minedno disp~(Intercept) theta_1|spp.1
#> (Intercept)       0.074736247 -0.0215995725      0.007442906 -0.0053396522
#> minedno          -0.021599573  0.0243940499     -0.003287995  0.0007609193
#> disp~(Intercept)  0.007442906 -0.0032879946      0.018259553 -0.0021647850
#> theta_1|spp.1    -0.005339652  0.0007609193     -0.002164785  0.0902780102