Just one call to each that enclose the RNG calls will do, I believe. Andy
From: Tib > > Greetings, > > I am trying to write a C++ subroutine of my random number > generator. Based > on tutorial in Writing R Extensions, one should call > GetRNGstate() before > and PutRNGstate() after calling R's random variate > generation routines. Now > suppose my function would generate n(n>1) numbers by a loop, > do I need to > call these two functions at each iteration? This certainly increases > computation burden (although indiscernible in my case). But > if I only call > them once (outside the loop), will the quality of my random numbers be > reduced because of serial correlations in RNG algorithms? I > do comparisons > between two methods, no significant difference is found. How > do you guys > write RNG functions? Any other specific reasons? Thanks, > > -- > I am Tib, not Rob. > > [[alternative HTML version deleted]] > > ______________________________________________ > 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
