as.AnisotropyScaling: Convert to anisotropy scaling matrix

In gmGeostats: Geostatistics for Compositional Analysis

Convert to anisotropy scaling matrix

Description

Convert an anisotropy specification to a scaling matrix

Usage

as.AnisotropyScaling(x)

## S3 method for class 'AnisotropyScaling'
as.AnisotropyScaling(x)

## S3 method for class 'numeric'
as.AnisotropyScaling(x)

## S3 method for class 'AnisotropyRangeMatrix'
as.AnisotropyScaling(x)

Arguments

x	an object convertible to an anisotropy scaling matrix; see details

Details

Method as.AnisotropyScaling.numeric() expects a vector of two numbers in 2D, or a vector of 5 numbers in 3D. These are in 2D, the azimuth of maximum continuity (in degrees, clockwise from North) and the anisotropy ratio of short/long range. In 3D these are: 1,2) the azimuth and the dip of the direction of maximal continuity; 3) the angle of rotation around the axis of the first direction; 4,5) the anisotropy ratios of the ranges of the second/first and third/first directions of maximal continuity. All angles are given in degrees, all ratios must be smaller or equal to 1. This follows gstat (and hence GSlib) conventions; see gstat::vgm() for details.

Value

A matrix A such that for any lag vector h, the variogram model turns isotropic in terms of u'=h'\cdot A.

Methods (by class)

• AnisotropyScaling: identity method

• numeric: from a vector of numbers

• AnisotropyRangeMatrix: from an AnisotropicRangeMatrix

See Also

Other anisotropy: AnisotropyRangeMatrix(), AnisotropyScaling(), anis_GSLIBpar2A(), as.AnisotropyRangeMatrix(), is.anisotropySpecification()

Examples

( l = anis_GSLIBpar2A(angles=30, ratios=0.5))
( ll = unclass(l) )
as.AnisotropyScaling(ll)

gmGeostats documentation built on April 18, 2023, 5:08 p.m.