| registeringCode {fields} | R Documentation |
Information objects that register C and FORTRAN functions.
Description
These are objects of class CallRoutine or FortranRoutine and also NativeSymbolInfo
They provide information for compiledfunctions 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 compliation of init.c in the
package source (src) directory.
Format
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.
Details
- addToDiagC
adds diagonal elements to a matrix. See
mKrig.- ExponentialUpperC
Fills in upper triangle of a matrix with the exponential covariance function. See
ExponentialUpper- compactToMatC
Converts compact format to full matrix format. See
compactToMat.- multebC
Mulitplies a vector/matrix with an exponential covariance function. See
exp.cov- multwendlandg
This has been mysteriously included but it is not a function!
- mltdrb
Evaluates the derivatives of thin plate sline radial basis functions. See
rad.cov.- RdistC
Euclidean distance function between sets of coordinates. See
rdist.- distMatHaversin
Used in
RdistEarth.- distMatHaversin2
Used in
RdistEarth.
See package_native_routine_registration_skeleton for the
utility used to create these data objects.
It is not clear why these routines have been flagged as needing documentation while other routines have not.
References
For background on registering C, C++ and Fortran functions see 5.4 of
Writing R Extensions. For this package refer to the C code in
src/intit.c as an example.
Examples
print(addToDiagC)