Map survey length composition overdispersion parameters

Internal helper called by Setup_Mod_SrvIdx_and_Comps to construct the TMB/RTMB factor maps for ln_SrvLen_theta [n_regions × n_sexes × n_srv_fleets] and ln_SrvLen_theta_agg [n_srv_fleets], the log-scale overdispersion parameters for survey length composition likelihoods. Follows identical activation logic to do_SrvAge_theta_mapping but operates on SrvLenComps_LikeType, SrvLenComps_Type, and UseSrvLenComps.

Usage

do_SrvLen_theta_mapping(input_list)

Arguments

input_list

Named list with $data, $par, and $map sublists. Requires $data$n_srv_fleets, $data$n_regions, $data$n_sexes, $data$SrvLenComps_Type, $data$SrvLenComps_LikeType, and $data$UseSrvLenComps.

Value

The input input_list with $map$ln_SrvLen_theta and $map$ln_SrvLen_theta_agg set to factor vectors. Active parameters receive sequential integer indices; inactive parameters are NA.

See also

do_SrvAge_theta_mapping for the analogous age composition overdispersion mapping; do_SrvLen_corr_pars_mapping for the associated correlation parameter mapping.