I am trying to figure out how to avoid creating a copy of an array in
c++ to a Rcpp::NumericVector or std::vector in order to use the data in
an embedded R instance (RInside object). It is clear that one can copy
an array in C++ to a Rcpp::NumericVector, then assign a variable in the
embedded R object, for example:
double myArray[5] = {1,2,3,4,5};
Rcpp::NumericVector myNumericVector(5);
for (int i=0; i<5; i++) {
myNumericVector[i] = myArray[i];
}
RInside R(argc, argv);
R["x"] = myNumericVector;
However, I would like to avoid having to create a copy of the array. Is
there a way to assign the "x" variable in the above example using
pointers to the C++ array "myArray"?
Also, I am interested in doing the inverse of that. Is it possible to
take the output of the embedded R code called by R.parseEval() and have
it return the values to a pre-allocated array in c++?
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