spde_precision: Precision matrix for Whittle-Matérn fields

In MetricGraph: Random Fields on Metric Graphs

Precision matrix for Whittle-Matérn fields

Description

Computes the precision matrix for all vertices for a Whittle-Matérn field.

Usage

spde_precision(kappa, tau, alpha, graph, BC = 1, build = TRUE)

Arguments

kappa	Range parameter.
tau	Precision parameter.
alpha	Smoothness parameter (1 or 2).
graph	A metric_graph object.
BC	Set boundary conditions for degree=1 vertices. BC =0 gives Neumann boundary conditions and BC=1 gives stationary boundary conditions.
build	If TRUE, the precision matrix is returned. Otherwise a list list(i,j,x, nv) is returned.

Value

Precision matrix or list.

MetricGraph documentation built on April 3, 2025, 10:34 p.m.