Salamander occupancy data
An occupancy data set for modelling presence/absence data for salamanders.
A data frame with 39 observations (sites) on the following 2 variables.
a character vector containing the presence (1) and absence (0) for each visit to the site
frequency of sites (always 1)
This is a data set that accompanies program PRESENCE and is explained on page 99 of MacKenzie et al. (2006).
MacKenzie, D.I., Nichols, J. D., Royle, J.A., Pollock, K.H., Bailey, L.L., and Hines, J.E. 2006. Occupancy Estimation and Modeling: Inferring Patterns and Dynamics of Species Occurence. Elsevier, Inc. 324p.
# This example is excluded from testing to reduce package check time
do.salamander=function()
{
data(salamander)
occ.p.dot=mark(salamander,model="Occupancy")
occ.p.time=mark(salamander,model="Occupancy",
model.parameters=list(p=list(formula=~time)))
occ.p.mixture=mark(salamander,model="OccupHet",
model.parameters=list(p=list(formula=~mixture)))
return(collect.models())
}
salamander.results=do.salamander()
print(salamander.results)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.