Dear Rcpp::Devels and Rcpp::Users,
I have maybe some trivial questions.
1. If I use
Rcpp::NumericVector A(someVector),
does it reuse memory from someVector for A? From
http://cran.r-project.org/web/packages/Rcpp/vignettes/Rcpp-quickref.pdf I would
say it does, whereas
Rcpp::NumerixVector A(clone(someVector))
does not.
2. Let us assume I am right in point 1, then my next question would arise
towards reusing memory from R: Does it make a difference in C++ if I create a
NumericVector with own memory and fill it in a loop or if I reuse memory from R
and fill it in a loop? Again, I would say no, as if memory is reused, we
usually pass a pointer to the memory tom the Rcpp Object, that has now direct
access to this memory (of course this will be different when using parallel
code, where memory allocation is essential).
3. Imagine I use now an S4 Object from R:
Rcpp::Export SEXP fName (SEXP& data_S4) {
Rcpp::S4 dataS4O (data_S4);
}
If data_S4 contains a list, has the command Rcpp::S4 dataS4(data_S4) already
created an Rcpp::List Object from it? If not, how do I proceed to get such a
Rcpp::List Object?
Best
Simon
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