rhoMatern: Matern Correlation Function

In geoCount: Analysis and Modeling for Geostatistical Count Data

Description

This function calculates the Matern correlation.

Usage

rhoMatern(u, a, k)

Arguments

u	a value which indicates the distance
a	a value which indicates the scale parameter, φ
k	a value which indicates the shape parameter, κ

Details

The function is \; \;ρ (u)= [2^{κ-1}τ(κ)]^{-1} (-u/φ)^κ K_κ(-u/φ) \; \; where K_κ(\cdot) denotes a modified Bessel function of order κ.

Value

A value of the correlation.

Author(s)

Liang Jing [e-mail]

See Also

rhoPowerExp, rhoSph, U2Z, loc2U.

Examples

## Not run: 
  rhoMatern(0.3, a=0.1, k=1)                  

## End(Not run)

geoCount documentation built on May 2, 2019, 12:38 a.m.