sarla_sim: Simulate a random walk with trends

In ChristineStawitz-NOAA/stspsize: State-Space Autoregressive Length-at-Age Model

Simulate a random walk with trends

Description

Simulate a random walk with trends

Usage

sarla_sim(
  sigma_p = 0.2,
  sigma_o = 0.1,
  Nages = 7,
  Nyears = 22,
  beta = 0.5,
  sigma_p_X0 = sigma_p,
  gamma_y_sd = 0,
  delta_c_sd = 0,
  eta_c_sd = 0
)

Arguments

sigma_p	double setting process error sd. 0.2 by default.
sigma_o	double setting observation error sd. 0.1 by default.
Nages	integer setting the number of ages. 7 by default.
Nyears	integer setting the number of years. 22 by default.
beta	double setting the degree of autocorrelation. 0.5 by default.
sigma_p_X0	double setting the sd of variation in starting values. Defaults to equivalent to sigma_p
gamma_y_sd	double setting the sd of year variation. Default is 0.
delta_c_sd	double setting the sd of cohort effect variation. Defaults to 0.
eta_c_sd	double setting the sd of the initial size cohort effect. Defaults to 0.

Value

list of simulated data

ChristineStawitz-NOAA/stspsize documentation built on July 16, 2025, 8:15 p.m.