Reconstruct an Observation-Level Random-Effect Design Matrix

Converts the transposed block random-effect design matrix used internally by `rtmb_glmer()` into an observation-level matrix. This is kept as a small utility for users who want to work from the block matrix returned by `make_glmer_re_terms()`.

Usage

make_glmer_Z_matrix(Zt, group_idx, N = length(group_idx))

Arguments

Zt

Transposed block random-effect design matrix.

group_idx

Integer group index for each observation.

N

Number of observations. Defaults to `length(group_idx)`.

Value

A matrix with `N` rows and one column per random-effect coefficient.