ITe5: Index Target Effort-Based

In zanbi/DLMtool: Data-Limited Methods Toolkit

Description

An index target MP where the Effort is modified according to current index levels (mean index over last 5 years) relative to a target level.

Usage

ITe5(x, Data, reps = 100, plot = FALSE, yrsmth = 5, mc = 0.05)

ITe10(x, Data, reps = 100, plot = FALSE, yrsmth = 5, mc = 0.1)

Arguments

x	A position in the data object
Data	A data object
reps	The number of stochastic samples of the MP recommendation(s)
plot	Logical. Show the plot?
yrsmth	The number of historical years over which to average the index
mc	The maximum fractional change in the effort among years.

Details

The TAE is calculated as:

\textrm{TAE}_y = \textrm{TAE}_{y-1} δ

where δ is \frac{I} {I_{\textrm{ref}}} averaged over last yrsmth years. I_{\textrm{ref}} is the index target (Data@Iref).

The maximum fractional change in TAE is specified in mc.

Value

An object of class Rec with the TAE slot(s) populated

Functions

• ITe5: Maximum annual changes are 5 per cent.

• ITe10: Maximum annual changes are 10 per cent.

Required Data

See Data for information on the Data object

ITe5: Ind, Iref, MPeff

ITe10: Ind, Iref, MPeff

Rendered Equations

See Online Documentation for correctly rendered equations

Author(s)

T. Carruthers

Examples

ITe5(1, DLMtool::SimulatedData, plot=TRUE)
ITe10(1, DLMtool::SimulatedData, plot=TRUE)

zanbi/DLMtool documentation built on April 12, 2020, 12:24 a.m.