Use R RNG about randomplantedforest HOT 2 CLOSED

cout: Yes, Rcout should be the way to go. To be flexible for non-Rcpp versions later, can we have something like a pointer to std::ostream that can be Rcout or cout or something else? We have something similar in ranger: https://github.com/imbs-hl/ranger/blob/ce497711884c783e133fb36750b60de4c140773f/src/Forest.h#L186
Alternative: Avoid messages from C++ completely and throw exceptions in case of error (catch them from R).

rand: Avoid rand but use <random>. Simple solution for RNG state is to seed the C++ RNG with an integer from R. But that won't give cross-system/architecture reproducibility, so using the Rcpp RNG should be better (explained somewhere in the Rcpp docs).

from randomplantedforest.

Fixed in #9.

But: We need to use one RNG for all random numbers (or at least seed them from each other) to ensure reproducibility. Best to use the R RNG when in Rcpp (see above).

from randomplantedforest.