> In the Rcpp vignettes, I found some of the R-like functions for > sampling from distributions (runif, rnorm, etc), but I didn't see a function > mimicking sample(). I checked the list of unit tests and didn't see it there > either. Have I missed it? Is there a C++ function I should be using to > sample (with replacement in my particular situation) from a vector (with > provided weights).
In the quickref (and introduction) vignette, there's an example of how to import a function from R and use it in C++. Honestly, I've found it easiest to just import sample() from R (in the stats namespace). Two things to note: 1. Performance -- there's a penalty for going back to R, but it's per function call. So, you can pull a vector result of sample into an integer vector. 2. I find it easiest to sample indices rather then elements of the set that I want to sample, and then do indexing within C++, for example with an STL style loop. I'm on the road now, but I can try to fire off an example in the next day or 2. -Christian -- A man, a plan, a cat, a ham, a yak, a yam, a hat, a canal – Panama! _______________________________________________ Rcpp-devel mailing list Rcpp-devel@lists.r-forge.r-project.org https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
