simDat73: Simulate data for Chapter 7.3: ANOVA with random effects of...

In ASMbook: Functions for the Book "Applied Statistical Modeling for Ecologists"

Simulate data for Chapter 7.3: ANOVA with random effects of population

Description

Simulate snout-vent length measurements of nSample smooth snakes in each of nPops populations. Data are simulated under the assumptions of a model with random effects of populations

Usage

simDat73(nPops = 10, nSample = 12, pop.grand.mean = 50, pop.sd = 3, sigma = 5)

Arguments

nPops	Number of populations
nSample	Samples from each population
pop.grand.mean	Mean of population means (hyperparameter)
pop.sd	Standard deviation of population means (hyperparameter)
sigma	Value for the residual standard deviation

Value

A list of simulated data and parameters.

nPops	Number of populations
nSample	Number of samples per population
pop.grand.mean	Mean of population means
pop.sd	SD of population means
sigma	Residual SD
pop	Indicator for population number
pop.means	Simulated population means
eps	Simulated residuals
y	Simulated lengths

Author(s)

Marc Kéry

Examples

str(dat <- simDat73())      # Implicit default arguments
# More pops, more snakes in each, more among-population variability
str(dat <- simDat73(nPops = 20, nSample = 30, pop.sd = 8)) 

# Revert to "model-of-the-mean" (larger sample size to minimize sampling variability)
str(dat <- simDat73(nSample = 1000, pop.sd = 0, sigma = 5))

ASMbook documentation built on Sept. 11, 2024, 5:38 p.m.