A function to compute the first derivatives of the log target with respect to the paramters of the latent field. Not intended for general purpose use.
GPdrv(
GP,
prior,
Z,
Zt,
eta,
beta,
nis,
cellarea,
spatial,
gradtrunc,
fftgrid,
covfunction,
d,
eps = 1e-06
)an object of class GPrealisation
priors for the model
design matirix on the FFT grid
transpose of the design matrix
vector of parameters, eta
vector of parameters, beta
cell counts on the extended grid
the cell area
the poisson offset
gradient truncation parameter
an object of class FFTgrid
the choice of covariance function, see ?CovFunction
matrix of toral distances
the finite difference step size
first derivatives of the log target at the specified paramters Y, eta and beta