sim_vonB: Closure for simulating length given age using von Bertalanffy...

In SimSurvey: Test Surveys by Simulating Spatially-Correlated Populations

Closure for simulating length given age using von Bertalanffy notation

Description

This function outputs a function which holds the parameter values supplied and the function either simulates lengths given ages or generates a length age key give a sequence of ages.

Usage

sim_vonB(
  Linf = 120,
  L0 = 5,
  K = 0.1,
  log_sd = 0.1,
  length_group = 3,
  digits = 0,
  plot = FALSE
)

Arguments

Linf	Mean asymptotic length
L0	Length at birth
K	Growth rate parameter
log_sd	Standard deviation of the relationship in log scale
length_group	Length group for length age key. Note that labels on the matrix produced are midpoints using the DFO conventions; see group_lengths. Also note that this length group will dictate the length group used in the stratified analysis run by run_strat.
digits	Integer indicating the number of decimal places to round the values to
plot	Produce a simple plot of the simulated values?

Value

Returns a function for use inside sim_abundance.

Examples

growth_fun <- sim_vonB(Linf = 100, L0 = 5, K = 0.2, log_sd = 0.05, length_group = 1, plot = TRUE)
growth_fun(age = rep(1:15, each = 100))
growth_fun(age = 1:15, length_age_key = TRUE)
sim_abundance(growth = sim_vonB(plot = TRUE))

SimSurvey documentation built on Sept. 19, 2023, 5:07 p.m.