[Rd] calling optimize/fmin from C code
Tamas K Papp
tpapp at Princeton.EDU
Thu Dec 28 15:46:28 CET 2006
To make a calculation (an innermost loop) that uses optimize faster, I
think I should write things in C. Is it possible to call fmin, which
is called by optimize, from C? It is not listed in Writing R
extensions, but I found
double Brent_fmin(double ax, double bx, double (*f)(double, void *),
void *info, double tol);
in Applic.h. Is this the function I am looking for?
My guess is that ax and bx are the endpoints, f is the function, but
what is it's second argument (void *)? What is *info?
Or is it some other function altogether?
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