paramsUtils {INLAspacetime}

Functions to help converting from/to user/internal parametrization. The internal parameters are 'gamma_s, 'gamma_t', 'gamma_E' The user parameters are 'r_s', 'r_t', 'sigma'

Description

Functions to help converting from/to user/internal parametrization. The internal parameters are 'gamma_s, 'gamma_t', 'gamma_E' The user parameters are 'r_s', 'r_t', 'sigma'

Convert from user parameters to SPDE parameters

Convert from SPDE parameters to user parameters

Usage

lgsConstant(lg.s, alpha, smanifold)

params2gammas(lparams, alpha.t, alpha.s, alpha.e, smanifold = "R2")

gammas2params(lgammas, alpha.t, alpha.s, alpha.e, smanifold = "R2")

Arguments

lg.s

the logarithm of the SPDE parameter ⁠\gamma_s⁠

alpha

the resulting spatial order.

smanifold

spatial domain manifold, which could be "S1", "S2", "R1", "R2" and "R3".

lparams

log(spatial range, temporal range, sigma)

alpha.t

temporal order of the SPDE

alpha.s

spatial order of the spatial differential operator in the non-separable part.

alpha.e

spatial order of the spatial differential operator in the separable part.

lgammas

numeric of length 3 with log(\gamma_k) model parameters. The parameter order is log(gamma.s, gamma.t, gamma.e)

Details

See equation (23) in the paper.

See equations (19), (20) and (21) in the paper.

See equations (19), (20) and (21) in the paper.

Value

the part of sigma from the spatial constant and ⁠\gamma_s⁠.

log(gamma.s, gamma.t, gamma.e)

log(spatial range, temporal range, sigma)

Examples

params2gammas(log(c(1, 1, 1)), 1, 2, 1, "R2")
gammas2params(log(c(0, 0, 0)), 1, 2, 1, "R2")