Conversion between truncated and unlimited effective detection distance (EDR)

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.

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. <doi:10.1525/auk.2012.11190>

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. <doi:10.1111/2041-210X.12106>

Supporting info, including a tutorial for the above paper: https://github.com/psolymos/QPAD/tree/master/inst/doc/v2

Author

Peter Solymos

Examples

convertEDR(1, 0.5, truncated=FALSE)
#> [1] 0.4703182
## should be close to 1
convertEDR(convertEDR(1, 0.5, truncated=FALSE), 0.5, truncated=TRUE)
#> [1] 1.000002