[Rcpp-devel] multiple function when using Inline

[Darren Cook]

> I'm not too clear on how to include the other c++ functions.  Is
> there a good example of this somewhere?

As Romain said, you abuse the includes argument (which is intended for
specifying #includes, etc. but can be anything) by putting the full
function in there.

Here is one way to calculate pi-squared:

----------------
library('inline')

header="
//Functions only visible by C++ code go here
double square_me(double x){
return x*x;
}
"

src="
//The callable-from-R function *body* goes here
double v=square_me(3.14);
return Rcpp::wrap(v);
";

fun=cxxfunction(signature(),src,plugin="Rcpp",includes=header)

print(fun())
----------------


If you don't see what is happening, add verbose=TRUE to the cxxfunction
call, and take a look at the source code that has been constructed.


Darren



--

Darren Cook, Software Researcher/Developer

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