I am hoping the solution to this question is simple, but I have not been able to find one. I am building a routine in C to be called from R. I am including Rmath.h. However, when I have a call to "log", I get the error "called object 'log' is not a function or a function pointer. When I "trick" it by calling log1p(x - 1), which I *know* is exported from Rmath.h, it works.
More completely, my includes are: #include <R.h> #include <Rmath.h> #include <Rinternals.h> #include <Rconfig.h> #include <stdlib.h> // for NULL #include <R_ext/Rdynload.h> The object being logged is a double, passed into C as an SEXP, call it "a", which for now will always be a singleton. I initialize a pointer double *pa = REAL(a). I eventually call log(pa[0]), which does not compile and throws the error listed above. Switching the call to log1p(pa[0] - 1.0) works and returns the proper answer. Even including math.h explicitly does not help, which makes sense as it is included by Rmath.h. Thank you, Avi ______________________________________________ R-package-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-package-devel
