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Build the block-structure metadata vectors for the Phase-2 TMB template

Source: R/tmb-demand.R
dot-tmb_build_block_map.Rd

Emits the integer vectors that tell the C++ template how to slice the parameter vector into per-block covariance components and how to map subject-level random effects through each block's Cholesky.

Usage

.tmb_build_block_map(re_parsed)

Arguments

re_parsed

Output of .normalize_re_input().

Value

A list of integer scalars and integer vectors describing the block structure (see Conventions above).

Details

Conventions:

  • block_types[b] = 0 for pdDiag, 1 for pdSymm.

  • block_q0_offset[b] / block_alpha_offset[b] are 0-indexed starting columns within Z_q0 / Z_alpha respectively.

  • n_logsigma is sum(block_q0_dim + block_alpha_dim) – one standard-deviation parameter per RE column across all blocks.

  • n_rho is sum(over pdSymm blocks: block_dim*(block_dim-1)/2) where block_dim = block_q0_dim + block_alpha_dim. pdDiag blocks contribute 0 free correlations.