#include <Eigen/Core> USING_PART_OF_NAMESPACE_EIGEN using namespace std; template<typename Scalar, typename Derived> const Eigen::Cast< typename Eigen::NumTraits<Scalar>::FloatingPoint, Derived > castToFloatingPoint(const MatrixBase<Scalar, Derived>& m) { return Eigen::Cast< typename Eigen::NumTraits<Scalar>::FloatingPoint, Derived >(m.ref()); } int main(int, char**) { Matrix2i m = Matrix2i::random(); cout << "Here's the matrix m. It has coefficients of type int." << endl << m << endl; cout << "Here's m/20:" << endl << castToFloatingPoint(m)/20 << endl; return 0; }