doHCR: Hockey Stick Harvest control rule that modifies TAC.
In Blue-Matter/MSEtool: Management Strategy Evaluation Toolkit

doHCR

R Documentation

Hockey Stick Harvest control rule that modifies TAC.

Description

A hockey stick (2 inflection points) HCR that accepts estimated level relative to reference level and modifies a proposed TAC based on control points for the x axis (est/ref) and y axis (fraction of TAC)

Usage

doHCR(trial_TAC, est, ref, CP = c(0, 1), CPy = c(0, 1))

Arguments

`trial_TAC`	Postitive real number, the proposed total allowable catch before HCR modification.
`est`	Positive real number on same scale as ref, the estimated stock level (e.g. mean current index level)
`ref`	Positive real number on same scale as est, a reference level of stock level (e.g. index level at BMSY)
`CP`	Vector of real numbers, 2 positions long (c(Lx, Ux)), the lower and upper control points of a hockey stick HCR on the xaxis (est/ref). Below Lx (est/ref < Lx) the TAC is trial_TAC x Ly. Above Ux (est/ref > Ux) the TAC is trial_TAC x Uy. Between the TAC is linearly ramped between these levels.
`CPy`	Vector of real numbers, 2 positions long (c(Ly, Uy)), the lower and upper control points of a hockey stick HCR on the yaxis (fraction of trial_TAC).