gstat (version 1.0-2)

estiStAni: Estimation of the spatio-temporal anisotropy

Description

Estimation of the spatio-temporal anisotropy without an underlying spatio-temporal model. Different methods are implemented using a linear model to predict the temporal gamma values or the ratio of the ranges of a spatial and temporal variogram model or a spatial variogram model to predict the temporal gamma values or the spatio-temporal anisotropy value as used in a metric spatio-temporal variogram.

Usage

estiStAni(empVgm, interval, method = "linear", spatialVgm, 
          temporalVgm, s.range=NA, t.range=NA)

Arguments

empVgm

An empirical spatio-temporal variogram.

interval

A search interval for the optimisation of the spatio-temporal anisotropy parameter

method

A character string determining the method to be used (one of linear, range, vgm or metric, see below for details)

spatialVgm

A spatial variogram definition from the call to vgm. The model is optimised based on the pure spatial values in empVgm.

temporalVgm

A temporal variogram definition from the call to vgm. The model is optimised based on the pure temporal values in empVgm.

s.range

A spatial cutoff value applied to the empirical variogram empVgm.

t.range

A temporal cutoff value applied to the empirical variogram empVgm.

Value

• A scalar representing the spatio-temporal anisotropy estimate.

Details

[object Object],[object Object],[object Object],[object Object]

Examples

data(vv)

estiStAni(vv, c(10, 150))
estiStAni(vv, c(10, 150), "vgm", vgm(80, "Sph", 120, 20))