[Rcpp-devel] clarification of interaction between RInside and RcppEigen

[Dirk Eddelbuettel]

Also note that "just" getting random numbers is taken care of via Rcpp sugar
which wraps rnorm() etc:

R> library(inline)
R>
R> R> f <- cxxfunction(signature(), plugin="Rcpp", body='
+    Rcpp::RNGScope tmp;
+    return rnorm(3);
+ ')
R> 
R> set.seed(42)
R> rnorm(3)                         ## using R
[1]  1.370958 -0.564698  0.363128
R> set.seed(42)
R> f()                              ## using the Rcpp function just created
[1]  1.370958 -0.564698  0.363128
R> 

Same RNG draws, as we deal properly with the RNG state (where RNGScope
helps).  Look at the list archives, this has been discussed a few times if
it seems too "magic".

Dirk



-- 
Dirk Eddelbuettel | edd at debian.org | http://dirk.eddelbuettel.com