LBSPR_NLLabsel: LBSPR Optimization function for age-based selectivity model

In AdrianHordyk/LBSPR: Length-Based Spawning Potential Ratio

LBSPR Optimization function for age-based selectivity model

Description

Internal optimization function

Usage

LBSPR_NLLabsel(
  starts,
  x,
  P,
  LMids,
  LBins,
  LDat,
  MK,
  Linf,
  FecB,
  L50,
  L95,
  maxsd,
  CVLinf,
  Nage,
  usePen
)

Arguments

starts	a vector of starting parameters, relative SL50 (SL50/Linf), deltaSL (SL95-SL50)/Linf, and F/M (in log space)
x	vector of relative ages
P	numeric value indicating proportion of cohort remaining at maximum age
LMids	a vector of the midpoints of the length classes
LBins	a vector of length classes
LDat	a vector of lenght frequencies. Must be same length as LMids
MK	the M/K value
Linf	the Linf value for the population as a hole
FecB	exponent of the length-fecundity relationship
L50	length at 50 per cent maturity
L95	length at 95 per cent maturity
maxsd	numeric value - maximum number of standard deviations of length-at-age dist
CVLinf	CV of length-at-age
Nage	number of pseudo age-classes
usePen	logical to use penalty for extreme estimates of selectivity

Value

negative log-likelihood value

Author(s)

A. Hordyk

AdrianHordyk/LBSPR documentation built on July 21, 2023, 6:27 p.m.