Giving 2 sub_models, build a correlated bivaraite operator based on K = D(theta, eta) $$D(\theta, \rho) = \begin{pmatrix} \cos(\theta) + \rho \sin(\theta) & -\sin(\theta) \sqrt{1+\rho^2} \\ \sin(\theta) - \rho \cos(\theta) & \cos(\theta) \sqrt{1+\rho^2} \end{pmatrix}$$
Usage
bv_matern(
mesh,
sub_models,
theta = 0,
rho = 0,
sd1 = 1,
sd2 = 1,
group = NULL,
share_param = FALSE,
fix_theta = FALSE,
...
)Arguments
- mesh
mesh for build the model
- sub_models
a list of sub_models (should be two matern models)
- theta
the parameter related to rotation
- rho
the parameter related to correlation
- group
group vector, can be inherited from ngme() function
TRUE if share the same parameter for 2 sub_models (of same type)
- ...
ignore