lgcp (version 0.9-2)

fftgrid: fftgrid function...

Description

fftgrid function

Usage

fftgrid(xyt, M, N, spatial, sigma, phi, model, covpars)

Arguments

xyt

object of class stppp

M

number of 'gridlines' in x-direction (= number of centroids + 1)

N

number of 'gridlines' in y-direction

spatial

an object of class spatialAtRisk

sigma

scaling paramter for spatial covariance function, see Brix and Diggle (2001)

phi

scaling paramter for spatial covariance function, see Brix and Diggle (2001)

model

correlation type see ?CovarianceFct

covpars

vector of additional parameters for certain classes of covariance function (eg Matern), these must be supplied in the order given in ?CovarianceFct

Value

• fft objects for use in MALA

Details

Advanced use only. Computes various quantities for use in lgcpPredict, lgcpSim and computeGradtrunc.

See Also

computeGradtrunc

Examples

xyt <- stppp(ppp(),t=c(),tlim=c(0,1))
sar <- spatialAtRisk(function(x,y){return(1)},warn=FALSE)
grid <- fftgrid(xyt,65,65,sar,1,0.01,"exponential",covpars=c())