convertEDR: Conversion between truncated and unlimited effective...

In detect: Analyzing Wildlife Data with Detection Error

Description

Conversion between truncated and unlimited effective detection distance (EDR).

Usage

convertEDR(edr, r, truncated=FALSE) 

Arguments

edr	effective detection distance. In same units as r.
r	truncation distance (radius of point count). In same units as edr.
truncated	logical, see Details.

Details

truncated = FALSE means that edr is unlimited EDR, and the function returns the truncated EDR given r.

truncated = TRUE means that edr is truncated EDR given r, and the function returns the unlimited EDR.

Value

A numeric vector with converted EDR values.

Author(s)

Peter Solymos

References

Matsuoka, S. M., Bayne, E. M., Solymos, P., Fontaine, P., Cumming, S. G., Schmiegelow, F. K. A., & Song, S. A., 2012. Using binomial distance-sampling models to estimate the effective detection radius of point-counts surveys across boreal Canada. Auk, 129, 268–282.

Solymos, P., Matsuoka, S. M., Bayne, E. M., Lele, S. R., Fontaine, P., Cumming, S. G., Stralberg, D., Schmiegelow, F. K. A. & Song, S. J., 2013. Calibrating indices of avian density from non-standardized survey data: making the most of a messy situation. Methods in Ecology and Evolution, 4, 1047–1058.

Supporting info, including a tutorial for the above paper: http://dcr.r-forge.r-project.org/qpad/

Examples

convertEDR(1, 0.5, truncated=FALSE)
## should be close to 1
convertEDR(convertEDR(1, 0.5, truncated=FALSE), 0.5, truncated=TRUE)

detect documentation built on May 2, 2019, 4:50 p.m.