retrospective: Retrospective analysis of assessment models

In SAMtool: Stock Assessment Methods Toolkit

Retrospective analysis of assessment models

Description

Perform a retrospective analysis, successive removals of most recent years of data to evaluate resulting parameter estimates.

Usage

retrospective(x, ...)

## S4 method for signature 'Assessment'
retrospective(x, nyr = 5, figure = TRUE)

## S4 method for signature 'RCModel'
retrospective(x, nyr = 5, figure = TRUE)

Arguments

x	An S4 object of class Assessment or RCModel.
...	More arguments.
nyr	The maximum number of years to remove for the retrospective analysis.
figure	Indicates whether plots will be drawn.

Value

A list with an array of model output and of model estimates from the retrospective analysis.

Figures showing the time series of biomass and exploitation and parameter estimates with successive number of years removed. For a variety of time series output (SSB, recruitment, etc.) and estimates (R0, steepness, etc.), also returns a matrix of Mohn's rho (Mohn 1999).

Author(s)

Q. Huynh

References

Mohn, R. 1999. The retrospective problem in sequential population analysis: an investigation using cod fishery and simulated data. ICES Journal of Marine Science 56:473-488.

Examples

output <- SP(Data = swordfish)
get_retro <- retrospective(output, nyr = 5, figure = FALSE)

SAMtool documentation built on Sept. 11, 2024, 8:07 p.m.