Vehicle-cpp/zjw/工控机安装资料/eigen-3.4.0/doc/snippets/MatrixBase_template_int_bottomRows.cpp

Array44i a = Array44i::Random();
cout << "Here is the array a:" << endl << a << endl;
cout << "Here is a.bottomRows<2>():" << endl;
cout << a.bottomRows<2>() << endl;
a.bottomRows<2>().setZero();
cout << "Now the array a is:" << endl << a << endl;