Special models for rotation like fields
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.
RMeaxxa(E, A) RMetaxxa(E, A, alpha)
E |
m-variate vector of positive values |
A |
m x k matrix |
alpha |
angle for the rotation matrix R |
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.
Martin Schlather, schlather@math.uni-mannheim.de, https://www.wim.uni-mannheim.de/schlather/
Schlather, M. (2010) On some covariance models based on normal scale mixtures. Bernoulli, 16, 780-797.
# see S10
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