26 lines
624 B
C++
26 lines
624 B
C++
// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
|
|
|
|
// This is a rewrite of the 'Writing R Extensions' section 5.10.1 example
|
|
|
|
#include <Rcpp.h>
|
|
|
|
using namespace Rcpp ;
|
|
RcppExport SEXP convolve14cpp(SEXP a, SEXP b){
|
|
NumericVector xa(a), xb(b);
|
|
int n_xa = xa.size() ;
|
|
int n_xb = xb.size() ;
|
|
int nab = n_xa + n_xb - 1;
|
|
NumericVector xab(nab);
|
|
Fast<NumericVector> fa(xa), fb(xb), fab(xab) ;
|
|
|
|
for (int i = 0; i < n_xa; i++)
|
|
for (int j = 0; j < n_xb; j++)
|
|
fab[i + j] += fa[i] * fb[j];
|
|
|
|
return xab ;
|
|
}
|
|
|
|
#include "loopmacro.h"
|
|
LOOPMACRO_CPP(convolve14cpp)
|
|
|