Function main

external/eigen/doc/examples/function_taking_ref.cpp:10–17

}

int main()
{
  Eigen::MatrixXf m = Eigen::MatrixXf::Random(4, 4);
  std::cout << "matrix m:\n" << m << "\n\n";
  std::cout << "inv_cond(m):          " << inv_cond(m)                      << "\n";
  std::cout << "inv_cond(m(1:3,1:3)): " << inv_cond(m.topLeftCorner(3,3))   << "\n";
  std::cout << "inv_cond(m+I):        " << inv_cond(m+Eigen::MatrixXf::Identity(4, 4)) << "\n";
}