A function to set up the computational grid and precision matrix structure for SPDE models.
Usage
setupPrecMatStruct(shape, cellwidth, no)
Arguments
shape
an object of class SpatialPolygons or SpatialPolygonsDataFrame
cellwidth
a scalar, the width of the grid cells
no
the order of the SPDE approximation: see Lindgren et al 2011 for details
Value
the computational grid and a function for constructing the precision matrix
References
Benjamin M. Taylor. Auxiliary Variable Markov Chain Monte Carlo for Spatial Survival and Geostatistical Models. Benjamin M. Taylor. Submitted.http://arxiv.org/abs/1501.01665
Finn Lindgren, Havard Rue, Johan Lindstrom. An explicit link between Gaussian fields and Gaussian Markov random fields: the stochastic partial differential equation approach. Journal of the Royal Statistical Society: Series B 73(4)