when using Rcpp, I want to use function abs, I just write Rcpp::abs(-1), but always an error:
no matching function for call to abs
Actually when I write Rcpp:ab, there are some hint that there exists Rcpp::abs(). I have tried some other function Rcpp::NumericVector, it works. I know I can use std::abs(-1), I just wonder why Rcpp::abs(-1) do not work, my system is windows, and I install Rtools.