calculate.mean.detection.prob: Mean detection probability.

Description Usage Arguments Value References Examples

Description

Calculates the mean detection probability over the range of observation.

Usage

1
calculate.mean.detection.prob(theta = theta, w, detection.function)

Arguments

theta

The detection function parameters. A single value for halfnormal, or a vector of two values for hazard rate.

w

The maximum range of observation. Objects at distance greater than w from the observer are assumed to never be recorded.

detection.function

The detection function. Only "halfnormal" and "hazard" (hazard rate) are supported at present.

Value

The mean detection probability over the distance range [0,w].

References

Buckland S, Anderson D, Burnham K, Laake J and Borchers D (2001). Introduction to Distance Sampling: Estimating Abundance of Biological Populations. Oxford: Oxford University Press.

Clark, R. G. (2016), "Statistical efficiency in distance sampling," PLoS One, forthcoming, www.plosone.org

Examples

1
calculate.mean.detection.prob(detection.function="hazard",theta=c(0.448,2),w=1) # should be 0.6

Example output

[1] 0.5998089

distance.sample.size documentation built on May 1, 2019, 10:27 p.m.