a4aLAK: Convert length frequency to age composition data

In Henning-Winker/a4adiags: Diagnostic Toolbox for a4a

Description

Converts a data.frame of multi-annual length frequency into age composition data

Usage

a4aLAK(
  Ldat,
  linf = 100,
  k = 0.2,
  t0 = -0.5,
  cvL = 0.15,
  ages = 0:5,
  sd.fix = FALSE,
  plot = FALSE,
  aW = NULL,
  bW = NULL
)

Arguments

Ldat	a matrix with two columns, where each row specifies the lower and upper length for a given length bin (the lowest should be -Inf, and highest Inf)
linf	Infinitve length
k	Brody growth coefficient
t0	theoretical age at zero Length
cvL,	CV of mean length-at-age
ages	desired age range
sd.fix	if TRUE a fix sd at length-at-age is assumed corresponding to 0.5*Linf
aW	parameter of length-weight in mm
bW	parameter of length-weight relationship

Value

AgeComp_at, a matrix of expected age-composition data, where columns are samples in year t, and cells are the count of samples with a given age and year

Henning-Winker/a4adiags documentation built on Sept. 14, 2020, 9:33 a.m.