matchscale {openCR}

Match Kernel

Description

Finds scale parameter (move.a) of a movement model that corresponds to desired quantile, or expected distance moved.

Usage

matchscale(movementmodel, q = 40, expected = NULL, p = 0.5, lower = 1e-05, upper = 1e+05, 
   move.b = 1, truncate = Inf)

Arguments

movementmodel

character (see Movement models and openCR-vignettes.pdf)

q

desired quantile (distance moved)

expected

numeric expected distance moved

p

cumulative probability

move.b

shape parameter of movement kernel

lower

lower bound interval to search

upper

upper bound interval to search

truncate

numeric q value at which distribution truncated

Details

The default behaviour is to find the movement parameter for the given combination of q and p.

The alternative, when a value is provided for ‘expected’, is to find the movement parameter corresponding to the given expected distance.

The truncate argument must be specified for movementmodel ‘UNIzi'. For movementmodel 'UNI’ there is no parameter and the radius of truncation is varied to achieve the requested quantile q corresponding to cumulative probability p, or the desired expected distance.

Value

Numeric value for move.a (scale parameter or zero-inflation in the case of ‘UNIzi’) or truncation radius (‘UNI’).

See Also

Movement models, pkernel, make.kernel, expected.d

Examples

matchscale('BVN', 40, 0.5)
matchscale('BVT', 40, 0.5, move.b = 1)
matchscale('BVT', 40, 0.5, move.b = 5)
matchscale('BVT', move.b = 5, expected = 10)