SSmohnsrho {r4ss}

Calculate Mohn's Rho values for select quantities

Description

Function calculates: (1) a rho value for the ending year for each retrospective relative to the reference model as in Mohn (1999), (2) a "Wood's Hole Mohn's Rho", which is a rho value averaged across all years for each retrospective relative to the reference model, and (3) an "Alaska Fisheries Science Center and Hurtado-Ferro et al. (2015) Mohn's rho, which is the average rho per retrospective "peel".

Usage

SSmohnsrho(summaryoutput, endyrvec, startyr, verbose = TRUE)

Arguments

summaryoutput

List created by SSsummarize. The expected order for the models are the full reference model, the retro -1, retro -2, and so forth.

endyrvec

Single year or vector of years representing the final year of values to show for each model.

startyr

Single year used to calculate the start of the Wood's Hole Mohn's Rho value across all years. Defaults to startyr of reference model.

verbose

Print messages when running the function?

Author(s)

Chantel R. Wetzel and Carey McGilliard

References

Hurtado-Ferro et al. 2015. Looking in the rear-view mirror: bias and retrospective patterns in integrated, age-structured stock assessment models. ICES J. Mar. Sci Volume 72, Issue 1, 1 January 2015, Pages 99-110, https://doi.org/10.1093/icesjms/fsu198 Mohn, R. 1999. The retrospective problem in sequential population analysis: An investigation using cod fishery and simulated data. ICES J. Mar. Sci Volume 56, Pages 473-488