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unmarked (version 0.11-0)

computeMPLElambda: Compute the penalty weight for the MPLE penalized likelihood method

Description

This function computes the weight for the MPLE penalty of Moreno & Lele (2010).

Usage

computeMPLElambda(formula, data, knownOcc=numeric(0), starts, method="BFGS",engine=c("C", "R"))

Arguments

formula
Double right-hand side formula describing covariates of detection and occupancy in that order.
data
knownOcc
Vector of sites that are known to be occupied. These should be supplied as row numbers of the y matrix, eg, c(3,8) if sites 3 and 8 were known to be occupied a priori.
starts
Vector of parameter starting values.
method
Optimization method used by optim.
engine
Either "C" or "R" to use fast C++ code or native R code during the optimization.
...
Additional arguments to optim, such as lower and upper bounds

Value

Details

See occuPEN for details and examples.

References

Moreno, M. and S. R. Lele. 2010. Improved estimation of site occupancy using penalized likelihood. Ecology 91: 341-346.

See Also

unmarked, unmarkedFrameOccu, occu, occuPEN, occuPEN_CV, nonparboot