Nmath Dll Download
Veola Delzell
I would like to include the header nmath.h for my C code (within an R package) to find R_FINITE and ML_ERR_return_NAN. I found that one cannot include nmath.h directly. For R_FINITE to be found, I could include R_ext/libextern.h. But I don't know what to include so that ML_ERR_return_NAN is found. Any ideas? I found here that Prof. Brian Ripley referred to Writing R Extensions, but I couldn't find nmath.h being addressed there (where exactly?)
Edit: Drats. Answered the wrong question :) nmath.h appears to not be exported from src/nmath/nmath.h but this R Mathlibrary is what is exported by R Core for use by others. Where as the nmath.h file has
The makefiles and other sources needed are in directory src/nmath/standalone, so the following instructions assume that is the current working directory (in the build directory tree on a Unix-alike if that is separate from the sources).
The resulting value of i is 23, which is indeed the case if err=>eta. We've namely crossed the intended value by one by setting it larger (>) instead of larger or equal to (=>). The intended result also shows at -source/blob/0b493ddbefbc3cc06f675841c4672b3197dbfbbb/src/nmath/gamma.c#L115. Yes, I'm aware that knowing the result makes this a rather useless excercise, but this case is explanatory and the algorithm is required in more than just this case.