simulate_data: Simulate data from the GAI

In calliste-fagard-jenkin/GAI: Generalised Abundance Index for Seasonal Invertibrates

Simulate data from the GAI

Description

Produces a simulated data set for observed counts of individuals at each of nS sites for nT occasions. Note, this function was implemented before covariate inclusion, and has no ability to deal with covariate-including data simulation.

Usage

simulate_data(
  par,
  nT = 25,
  totals = rep(500, 50),
  a_type = "mixture",
  dist_type = "P",
  options = list(),
  thin = 0.4,
  returnDF = F
)

Arguments

par	The vector of parameter values to be used
nT	The integer number of sampling occasions
totals	The integer site total for each site
a_type	The character name of the seasonal distribution
dist_type	The character name of the count distribution
options	A list of options to specify behaviours of the seasonal distribution. Inlcludes B, the number of broods. Currently covariates are not supported.
thin	The proportion of sampling opportunities which should be missed, and replaced with an NA.
returnDF	If TRUE, returns a data.frame with site, occasion, and count columns, rather than a matrix of counts

Value

A matrix of simulated counts for each site (rows) and each occasion (columns).

calliste-fagard-jenkin/GAI documentation built on July 26, 2022, 11:20 a.m.