Calculate Troll Survey Likelihood (Version 1)

Usage

get_troll_like_v1(
  troll_switch,
  troll_years,
  troll_obs,
  troll_sd,
  troll_tau,
  number_ysa
)

Arguments

troll_switch: An integer scalar, switch to turn on (>0) or off (0) the troll likelihood.
troll_years: An integer vector, year indices for troll survey observations.
troll_obs: A numeric vector, observed troll survey values.
troll_sd: A numeric vector, observation error standard deviations.
troll_tau: A numeric scalar, additional variance parameter.
number_ysa: A numeric array of dimensions \[n_year + 1, n_season, n_age\], numbers-at-age.

Value

A list containing:

pred: Predicted troll survey values (numeric vector)
resid: Standardized residuals (numeric vector)
lp: Negative log-likelihood values (numeric vector)

Legacy status

These functions reproduce historical version-1 assessment code for audit and comparison. They are not the production SBT objective, do not implement the current data, mortality, harvest-wall, or biological-state contracts, and receive only compatibility maintenance. New analyses should use get_data(), sbt_model(), and the current component helpers.