To build the the precision matrix for a spacetime model given the temporal and the spatial meshes.
Arguments
- smesh
a mesh object over the spatial domain.
- tmesh
a mesh object over the time domain.
- model
a string identifying the model. So far we have the following models: '102', '121', '202' and '220' models.
- theta
numeric vector of length three with \(log(gamma_s, gamma_t, gamma_e)\).
- verbose
logical to print intermediate objects.