mesytec-mnode/external/taskflow-3.8.0/3rd-party/eigen-3.3.7/doc/snippets/PartialRedux_maxCoeff.cpp

Matrix3d m = Matrix3d::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is the maximum of each column:" << endl << m.colwise().maxCoeff() << endl;