estVarMKDE {mkde}

Estimate move variances for 3D MKDE.

Description

Estimates the move variance for the (x, y) and z dimensions and altitude for a Brownian bridge MKDE.

Usage

estVarMKDE(move.dat)	

Arguments

move.dat

A move data object created with initializeMovementData

Details

Computes maximum-likelihood estimates for move variances. If the MKDE is 2D or 2.5D, only the variance for the xy-dimension is estimated. If the MKDE is 3D, a separate move variance for the z-dimension is also estimated.

Value

A move data object updated with move variances

Author(s)

Jeff A. Tracey, PhD
USGS Western Ecological Research Center, San Diego Field Station
[e-mail]
James Sheppard, PhD
San Diego Zoo Institute for Conservation Research
[e-mail]

Examples

data(condor)
mv.dat <- initializeMovementData(condor$time, condor$x, condor$y, 
z.obs=condor$z, sig2obs=25.0, sig2obs.z=81.0, t.max=65.0)

mv.dat <- estVarMKDE(mv.dat)
cat(paste("Move variance in xy-dimensions = ",
mv.dat$sig2xy[1], "\n", sep=""))
cat(paste("Move variance in z-dimension = ",
mv.dat$sig2z[1], "\n", sep=""))