registerdFORTRAN: Internal FORTRAN routines for working with grids and finding...
In LatticeKrig: Multi-Resolution Kriging Based on Markov Random Fields

Description Format Details References Examples

These are objects of class FortranRoutine and also NativeSymbolInfo They provide information for compiled functions called with .Call, or .Fortran. Ordinarily one would not need to consult these and they are used to make the search among dynamically loaded libraries ( in particular the fields library ) have less ambiguity and also be faster. These are created when the package/library is loaded are have their definitions from the compilation of init.c in the package source (src) directory.

The format is a list with components:

name: The (registration ?) name of the C function.
address: See NativeSymbolInfo.
dll: Dynamically linked library information.
numParameters: Number of calling arguments in function.

Registered routines are

findnorm: Finds marginal variance quickly for the case of a rectangular lattice, a specific Wendland basis, and constant a.wght at a given level. Called from LKRectangleFastNormalization
lkdist: Euclidean distance between two sets of coordinates but restricted to a maximum distance.Called from LKDist.
lkdistcomp: Same as lkdist but returns the component distances for each coordinate.Called by LKDistComponents
lkdistgrid: Finds all distances in x1 that are within delta of a set of grid points. Results are returned in the row, column, value sparse matrix format.called from LKDistGrid
lkdistgridcomp: Same as lkdistgrid but the component distances are found for each coordinate.LKDistGridComponents
lkdiag: Fills in diagonal and off diagonal elements in sparse matrix format.

See package_native_routine_registration_skeleton for the utility used to create these data objects.

For background on registering C, C++ and Fortran functions see 5.4 of Writing R Extensions. See http://r.789695.n4.nabble.com/Registration-of-native-routines-td4728874.html for additional discussion of code registration.