R: Special models for rotation like fields

RMeaxxa {RandomFields} | R Documentation

## Special models for rotation like fields

### Description

`RMeaxxa` and `RMetaxxa` define the auxiliary functions

C(h) = h^T A A^T h + diag(E)

and

C(h) = h^T A R R^R A^T h + diag(E)

, respectively.

### Usage

    RMeaxxa(E, A)
    RMetaxxa(E, A, alpha)

### Arguments

`E` | m-variate vector of positive values
`A` | m x k matrix
`alpha` | angle for the rotation matrix R

### Details

`RMeaxxa` is defined in space and returns an m-variate model.

`RMetaxxa` is a space-time model with two spatial dimensions. The matrix R is a rotation matrix with angle β t where t is the time component.

### Value

`RMeaxxa` and `RMetaxxa` return an object of class `RMmodel`.

### Author(s)

Martin Schlather, schlather@math.uni-mannheim.de

### References

- Schlather, M. (2010) On some covariance models based on normal scale mixtures. Bernoulli, 16, 780-797.

### See Also

`RMmodel`, S10

### Examples

    # see S10

[Package RandomFields version 3.1.50 Index]