[Rcpp-devel] How to use https://github.com/jjallaire/rcpp-gallery/blob/gh-pages/src/2013-01-05-r-function-from-c++.cpp?

library(Rcpp)
sourceCpp

library(Rcpp)
sessionInfo()

If you compile it from within R using sourceCpp("cpp_file_name.cpp "). Or if
you use the package inline, you can do the following inside R.

cppFunction('
      NumericVector callFunction(NumericVector x, Function f) {
           NumericVector res = f(x);
           return res;
     }'
 )

Both methods let you directly call the function callFunction(x, f) (without
having to use .Call())

callFunction(rnorm(30), sum)





On Thu, May 23, 2013 at 9:14 PM, Peng Yu <pengyu.ut at gmail.com> wrote:

Hi,

I'm able to compile 2013-01-05-r-function-from-c++.cpp to the .so
file. But I'm not able to call "callFunction" in R does anybody know
what the correct way is to call R functions in C++? Thanks.

dyn.load('2013-01-05-r-function-from-c++.so')
x <- rnorm(1e5)
.Call('callFunction', x, fivenum)

Error in .Call("callFunction", x, fivenum) :
  C symbol name "callFunction" not in load table

callFunction(x, fivenum)

Error: could not find function "callFunction"

--
Regards,
Peng