maternEffectiveRange: Compute effective range for Matern correlation to drop to a...

In jmhewitt/telefit: Estimation and Prediction for Remote Effects Spatial Process Models

Description

The effective range for an isotropic spatial correlation function is commonly defined to be the distance beyond which the correlation becomes small, typically below .05. Given range and smoothness parameters for a Matern covariance function, this function numerically searches for this distance. Note that the scale is not important for this calculation.

Usage

maternEffectiveRange(cor = 0.05, range = 1, smoothness = 0.5)

Arguments

cor	Effective correlation to check for
range	Matern range parameter. Controls the decay of pointwise correlations as a function of distance.
smoothness	Matern smoothness parameter. Controls the number of process derivatives.

Examples

# effective range for exponential covariance function with range = 1,
# which is theoretically known to equal -ln(.05)
maternEffectiveRange(cor = .05, range = 1, smoothness = .5)

jmhewitt/telefit documentation built on Feb. 9, 2020, 7:15 p.m.