Le 04/01/12 14:29, Hadley Wickham a écrit :
Hi all,
I'm still just getting my feet wet in Rcpp, so please excuse the
naivety of my question, but is this the appropriate idiom for treating
an input as a C++ scalar?
f<- cxxfunction(signature(x = "integer"), plugin = "Rcpp", '
Rcpp::IntegerVector x1(x);
int x2 = x1[0];
return(Rcpp::NumericVector(x2));
')
i.e. is there any way I can turn x in x2 more succinctly? (This
function is just for illustrative purposes - I'm trying to do
something at least a little more complicated)
Thanks!
Hadley
Yep,
We have "as" for this, and wrap for the other way around:
f<- cxxfunction(signature(x = "integer"), plugin = "Rcpp", '
int x2 = as<int>(x) ;
return wrap(x2) ;
')
Romain
--
Romain Francois
Professional R Enthusiast
http://romainfrancois.blog.free.fr
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