00001 Matrix3d m = Matrix3d::Random(); 00002 cout << "Here is the matrix m:" << endl << m << endl; 00003 cout << "Here is the sum of each column:" << endl << m.colwise().sum() << endl; 00004 cout << "Here is the maximum absolute value of each column:" 00005 << endl << m.cwiseAbs().colwise().maxCoeff() << endl;