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Fine-Tune Cost Parameters for Open-Access Fleets

Source: R/fine_tune_costs.R
fine_tune_costs.Rd

Objective function used by tune_fleets to calibrate cost_per_unit_effort for open-access fleets so that the simulated depletion or exploitation rate matches a user-supplied target.

Usage

fine_tune_costs(log_cost_mult, target, fauna, fleets, years = 25, tune_type)

Arguments

log_cost_mult

Numeric vector. Log-scale cost-per-unit-effort multipliers, one per open-access fleet.

target

Data frame with columns critter and target, giving the desired depletion level for each species.

fauna

List of fauna objects (from create_critter).

fleets

List of fleet objects (from create_fleet).

years

Integer. Number of years to simulate during optimisation (default 25).

tune_type

Character. One of "depletion" or "explt", indicating what metric is being matched to target.

Value

Numeric scalar: sum of squared differences between simulated and target values (used as the objective for optimisation).