Class of objects that are generated by preCKrige if the attribute newdata is of the class SpatialPoints or SpatialPointsDataFrame. This class has a show and summary method.
Class of objects that are generated by preCKrige if the attribute newdata is of the class SpatialPolygons or SpatialPolygonsDataFrame. This class has a show and summary method.
Plotting method for objects of the class preCKrige.polygons. The plot show the block neighbourhood configuration for one polygon (block) of a preCKrige.polygons object as well as its area approximation by the pixels.
CKrige
(Package: constrainedKriging) :
Spatial interpolation (2D) by constrained, covariance-matching
Function for constrained, covariance-matching constrained and universal (external drift kriging) point or block (of any shape) kriging in a global neighbourhood and for isotropic covariance models.
preCKrige
(Package: constrainedKriging) :
Spatial Variance-Covariance Matrices for Points and Polygons of any Shape
The function preCKrige provides (approximated) spatial variance-covariance matrices for user defined sets of polygons (blocks) of any shape or points for two-dimensional isotropic random fields. The polygon (block) areas of a set of polygons (polygon neighbourhood configuration) are approximated by pixels and the block-block covariances are approximated by averaging the pixel covariances of the approximated polygon (block) areas.
The constrainedKriging package provides functions for tow-dimensional spatial interpolation by constrained, covariance-matching constrained and universal (external drift) kriging for points or block of any shape for data with a nonstationary mean function and an isotropic weakly stationary variogram. The linear spatial interpolation methods, constrained and covariance-matching constrained kriging, provide approximately unbiased prediction for nonlinear target values under change of support.
providing 
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