sim.pdata {AHMbook} R Documentation

## Simulate non-hierarchical point transect (= point count) data

### Description

Function simulates coordinates of individuals on a square with a count location at the center point.

### Usage

sim.pdata(N = 1000, sigma = 1, B = 3, keep.all = FALSE, show.plot = TRUE)


### Arguments

 N total population size in the square sigma scale of half-normal detection function B circle radius; the data are simulated over a square of side 2 * B, but individuals outside the circle of radius B are not detected. keep.all if TRUE, the data for all individuals are returned; if FALSE, only for individuals detected. show.plot choose whether to show plots or not. Set to FALSE when using function in simulations.

### Value

A list with the following elements:

 N total population size in the square sigma scale of half-normal detection function B circle radius u1, u2 the x and y coordinates of each of the individuals d the distance of each individual from the center of the circle y a 0/1 indicator showing whether each individual is detected or not, a vector of length N N.real the realized number of individuals within the circle of radius B

### Author(s)

Marc Kéry & Andy Royle

### References

Kéry, M. & Royle, J.A. (2016) Applied Hierarchical Modeling in Ecology AHM1 - 8.2.5.1.

### Examples

# Simulate a data set with the default arguments and look at the structure of the output:
tmp <- sim.pdata()
str(tmp)


[Package AHMbook version 0.2.9 Index]