To find out what those parameters are, I would suggest "May the Source be with you".
What's I like to point out though, is that in R, sometimes it is the loop construct which is slow; and also the slower part may not be where you think it is. I would suggest looking into (1) moving the whole loop into C, (2) replace explicit loops with mapply/tapply/sapply , (3) run Rprof() to learn which part of your code is the slowest - it might not be where you think it is. Good luck. Hin-Tak Leung Tamas K Papp wrote: > Hi, > > 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? > > Thanks, > > Tamas > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
