computeMPLElambdas: Compute the penalty weight for the MPLE penalized likelihood...

In unmarked: Models for Data from Unmarked Animals

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	An unmarkedFrameOccu object
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.

Details

See occuPEN for details and examples.

Value

The computed lambda.

Author(s)

Rebecca A. Hutchinson

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

unmarked documentation built on Sept. 11, 2024, 8:28 p.m.