simDat15: Simulate data for Chapter 15: Comparing two groups of...

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

Simulate data for Chapter 15: Comparing two groups of binomial counts

Description

Generate presence/absence data for two gentian species (Bernoulli variant)

Usage

simDat15(N = 50, theta.cr = 12/50, theta.ch = 38/50)

Arguments

N	Number of sites
theta.cr	Probability of presence for cross-leaved gentian
theta.ch	Probability of presence for chiltern gentian

Value

A list of simulated data and parameters.

N	Number of sites
theta.cr	Probability for cross-leaved gentian
theta.ch	Probability for chiltern gentian
y	Simulated presence/absence data
species.long	Species indicator (longform), 1 = chiltern
C	Aggregated presence/absence data
species	Species indicator for aggregated data
chiltern	Effect of chiltern (difference in species intercepts)

Author(s)

Marc Kéry

Examples

str(dat <- simDat15())      # Implicit default arguments

# Revert to "Binomial model-of-the-mean"
# (Increase sample size to reduce sampling variability)
str(dat <- simDat15(N = 100, theta.cr = 40/100, theta.ch = 40/100)) 

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