move (version 1.0)

brownian.motion.variance.dyn: Calculates the dynamic brownian motion variance

Description

A function to calculate the dynamic brownian motion variance for a movement track. It can be used by advanced programmers to program against.

Usage

## S3 method for class '.MoveTrackSingle,numeric,numeric,numeric':
brownian.motion.variance.dyn(object, location.error, window.size, margin)

Arguments

object

An object of the Move-class, that can be used for variance calculation. It needs to be in a flat coordinate system.

location.error

A numeric vector with the location error.

window.size

The window size used for the variance calculation.

margin

The margin size used for variance calculation.

Value

• An object of the type dBMvariance is returned

References

Kranstauber, B., Kays, R., LaPoint, S. D., Wikelski, M. and Safi, K. (2012), A dynamic Brownian bridge movement model to estimate utilization distributions for heterogeneous animal movement. Journal of Animal Ecology. doi: 10.1111/j.1365-2656.2012.01955.x

See Also

brownian.bridge.dyn

Examples

data <- move(system.file("extdata","leroy.csv.gz",package="move"))[1:80,]
data2 <- spTransform(data, CRSobj="+proj=aeqd", center=TRUE)
dBMvar <- brownian.motion.variance.dyn(object=data2, location.error=rep(23.5,n.locs(data2)), margin=13, window.size=31)
dBMvar