spde_variance {MetricGraph} | R Documentation |
Variancefor Whittle-Matérn fields
Description
Computes the variance function for a Whittle-Matérn field. Warning is not feasible for large graph due to matrix inversion
Usage
spde_variance(
kappa,
tau,
range,
sigma,
alpha,
graph,
BC = 1,
include_vertices = FALSE,
directional = F
)
Arguments
kappa |
Parameter kappa from the SPDE. |
tau |
Parameter tau from the SPDE. |
range |
Range parameter. |
sigma |
Standard deviation parameter. |
alpha |
Smoothness parameter (1 or 2). |
graph |
A |
BC |
boundary conditions |
include_vertices |
Should the variance at the vertices locations be included in the returned vector? |
directional |
bool is the model a directional or not. directional only works for alpha=1 |
Details
Compute the variance \rho(s_i,s_i)
where
s_i
are all locations in the mesh
of the graph.
Value
Vector with the variance function evaluate at the mesh locations.
[Package MetricGraph version 1.5.0 Index]