matern: ngme Matern SPDE model specification

In ngme2: Linear Latent Non-Gaussian Models with Flexible Distributions

ngme Matern SPDE model specification

Description

ngme Matern SPDE model specification

Usage

matern(
  mesh = NULL,
  alpha = 2,
  fix_alpha = TRUE,
  kappa = NULL,
  theta_kappa = NULL,
  rational_order = 2,
  B_kappa = NULL
)

Arguments

mesh	an fmesher::fm_mesh_2d object, mesh for build the SPDE model
alpha	SPDE smoothness parameter (alpha = 2beta) 2 or 4 for integer case, otherwise for fractional case
fix_alpha	if FALSE, enable fractional modeling
kappa	the range parameter, for the stationary model, it is the range parameter
theta_kappa	kappa = exp(B_kappa * theta_kappa), for the non-stationary model, it is the range parameter
rational_order	order of rational approximation for fractional operators (default: 2)
B_kappa	bases for theta_kappa, ignore if use the stationary model

Value

ngme_operator object

ngme2 documentation built on May 20, 2026, 9:10 a.m.