GPdrv2 {lgcp}

GPdrv2 function

Description

A function to compute the second derivative of the log target with respect to the paramters of the latent field. Not intended for general purpose use.

Usage

GPdrv2(
  GP,
  prior,
  Z,
  Zt,
  eta,
  beta,
  nis,
  cellarea,
  spatial,
  gradtrunc,
  fftgrid,
  covfunction,
  d,
  eps = 1e-06
)

Arguments

GP

an object of class GPrealisation

prior

priors for the model

Z

design matirix on the FFT grid

Zt

transpose of the design matrix

eta

vector of parameters, eta

beta

vector of parameters, beta

nis

cell counts on the extended grid

cellarea

the cell area

spatial

the poisson offset

gradtrunc

gradient truncation parameter

fftgrid

an object of class FFTgrid

covfunction

the choice of covariance function, see ?CovFunction

d

matrix of toral distances

eps

the finite difference step size

Value

first and second derivatives of the log target at the specified paramters Y, eta and beta