[Rcpp-devel] rcpp sugar elementary question

Bharath Govindarajan bharath.quant at gmail.com
Tue Feb 19 16:49:43 CET 2013

Hi ,

I am trying a simple example to assign entire rows to a
Rcpp::NumericMatrix. I read the Rcpp sugar document and looked at a few
examples. My simple code below produces errors:

 #include <iostream>
 #include <Rcpp.h>

using std::cout;
using  std:endl;

// [[Rcpp::export]

void test()

     Rcpp::NumericMatrux mat(100,100);
     int rows = mat.nrow();
     int cols  = mat.ncol();
     cout << "rows " << rows << endl;
     cout << "cols " << cols << endl;
      Rcpp::NumericVector row2 = mat(1,_);
     cout << "mat(1,_) " << row2 << endl;


Error:   error: '_' was not declared in this scope

Thank you
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