Usage
lgcpSimSpatialCovariates(formula, owin, regionalcovariates = NULL,
pixelcovariates = NULL, Zmat = NULL, beta, poisson.offset = NULL,
cellwidth, model.parameters, spatial.covmodel = "exponential",
covpars = c(), ext = 2, plot = FALSE, inclusion = "touching")
Arguments
formula
a formula of the form X ~ var1 + var2
etc.
owin
the observation window on which to do the
simulation
regionalcovariates
an optional object of class
SpatialPolygonsDataFrame containing covariates
pixelcovariates
an optional object of class
SpatialPixelsDataFrame containing covariates
Zmat
optional design matrix, if the
polygon/polygon overlays have already been computed
beta
the parameters, beta for the model
poisson.offset
the poisson offet, created using a
SpatialAtRisk.fromXYZ class of objects
cellwidth
the with of cells on which to do the
simulation
model.parameters
the paramters of the model eg
list(sigma=1,phi=0.2)
spatial.covmodel
the choice of spatial covariance
model, can be anything from the RandomFields covariance
function, CovariacenFct.
covpars
additional covariance parameters, for the
chosen model, optional.
ext
the amount by which to extend the observation
grid in each direction, default is 2
plot
whether to plot the resulting data
inclusion
criterion for cells being included into
observation window. Either 'touching' or 'centroid'. The
former, the default, includes all cells that touch the
observation window, the latter includes all cells whose
centroids are inside the observation wi