simTrend: Simulate population survey data.

In jknape/poptrend: Estimate Smooth and Linear Trends from Population Count Survey Data

Simulate population survey data.

Description

Simulates count survey data with a non-linear trend, and site and temporal random effects. The logistic function is used to create a trend the reduces the expected population size to half its initial value over the time period.

Usage

simTrend(nyear = 30, nsite = 40, mu = 3, timeSD = 0.1, siteSD = 0.3)

Arguments

nyear	The number of years in the simulated survey.
nsite	The number of sites in the simulated survey
mu	The expected mean of the counts at the start of the survey.
timeSD	Standard deviation (at log-scale) of annual mean deviation from the trend.
siteSD	Standard deviation (at log-scale) of simulated among site variation.

Value

A data frame containing simulated data.

Author(s)

Jonas Knape

jknape/poptrend documentation built on Nov. 24, 2023, 7:07 a.m.