[Rcpp-devel] Setting the R random seed from Rcpp
romain at r-enthusiasts.com
Fri Jun 7 16:42:24 CEST 2013
You can do something like this (i'm on my phone, so you might have to change it):
Environment g = Environment::global_env() ;
Environment::Binding RandomSeed = g[".Random.seed"] ;
You get the current value of the binding like this:
NumericVector someVariable = RandomSeed ;
And then when you want to set the variable: you just do :
RandomSeed = someVariable ;
The Environment::Binding class acts a a proxy class.
Le 7 juin 2013 à 16:22, Matteo Fasiolo <matteo.fasiolo at gmail.com> a écrit :
> Dear Rcpp experts,
> I would like to be able to store the R random seed from a Rcpp
> function and then reset it. In other words I would like to replicate
> the following code in Rcpp:
> savedSeed <- .Random.seed
> x <- Rfunction(parameters1);
> .Random.seed <- savedSeed
> x1 <- Rfunction(parameters2);
> where Rfunction simulates some random numbers and uses them
> but with different parameter values.
> Is it possible to do something similar in Rcpp?
> Probably using GetRNGstate() and PutRNGstate()?
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