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 <[email protected]> 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
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>
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