| detector {secr} | R Documentation |
Detector Type
Description
Extract or replace the detector type.
Usage
detector(object, ...)
detector(object) <- value
Arguments
object |
object with ‘detector’ attribute e.g. |
value |
character string for detector type |
... |
other arguments (not used) |
Details
Valid detector types are ‘single’, ‘multi’, ‘proximity’, ‘count’, ‘capped’,
‘signal’, ‘polygon’, ‘transect’, ‘polygonX’, and ‘transectX’. The
detector type is stored as an attribute of a traps object.
Detector types are mostly described by Efford et al. (2009a,b; see also
secr-overview.pdf). Polygon and transect detector types are
for area and linear searches as described in
secr-polygondetectors.pdf and Efford (2011). The ‘signal’
detector type is used for acoustic data as described in
secr-sound.pdf.
The ‘capped’ detector type refers to binary proximity data in which no more than one individual may be detected at a detector on any occasion. The type is partially implemented in secr 3.1.1: data may be simulated and manipulated, but for model fitting these are treated as proximity data by secr.fit().
Value
character string for detector type
References
Efford, M. G. (2011) Estimation of population density by spatially explicit capture–recapture with area searches. Ecology 92, 2202–2207.
Efford, M. G., Borchers D. L. and Byrom, A. E. (2009a) Density estimation by spatially explicit capture-recapture: likelihood-based methods. In: D. L. Thomson, E. G. Cooch and M. J. Conroy (eds) Modeling Demographic Processes in Marked Populations. Springer, New York. Pp. 255–269.
Efford, M. G., Dawson, D. K. and Borchers, D. L. (2009b) Population density estimated from locations of individuals on a passive detector array. Ecology 90, 2676–2682.
See Also
Examples
## Default detector type is "multi"
temptrap <- make.grid(nx = 6, ny = 8)
detector(temptrap) <- "proximity"
summary(temptrap)