I have looked at your (i.e. Dirk and Roman's) submitted Rjournal article on Rcpp and decided that I should take the plunge.
To get my feet wet I am starting with a relatively simple example interfacing to (God help us) 1960's style Fortran written by Mike Powell and incorporated in the minqa package. The value to be returned is a named list of heterogeneous values. I can see how to construct such a list in the classic Rcpp API using a RcppResultSet object but I don't know the best way to accomplish this in the more modern Rcpp namespace. Can someone point me in the right direction? Also, is there a convenient idiom for attaching an S3 class name to a list to be returned? An unrelated question -- has anyone looked at accessing S4 classed objects in Rcpp? I have had considerable experience with S4 classes and objects and could keep such a project in mind as I begin to explore Rcpp. Yet another question, if i may. Does coercion take place in constructing an object like Rcpp::NumericVector aa(a); where a is an SEXP, say an SEXP argument to a C++ function, where I accidentally passed an integer vector instead of a double vector? If so, what happens if there is no coercion? Are the contents of the SEXP copied to newly allocated storage or not? The reason that I ask is because there are some places in the lme4 code where I want to make sure that I have a pointer to the contents of the original vector because I am want to change the contents without copying. _______________________________________________ Rcpp-devel mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel
