Sum a vector (sumv)
By tholscla on Sat, 11/02/2013 - 10:45
This is the same as the R function sum when used on a vector.
double sumv(Rcpp::NumericVector A)
{ int na= A.size();
double b=0;
for (int i = 0; i < na; i++)
{ b=b+A(i);
}
return b;
}