| const int size = 6; |
| MatrixXd mat1(size, size); |
| mat1.topLeftCorner(size/2, size/2) = MatrixXd::Zero(size/2, size/2); |
| mat1.topRightCorner(size/2, size/2) = MatrixXd::Identity(size/2, size/2); |
| mat1.bottomLeftCorner(size/2, size/2) = MatrixXd::Identity(size/2, size/2); |
| mat1.bottomRightCorner(size/2, size/2) = MatrixXd::Zero(size/2, size/2); |
| std::cout << mat1 << std::endl << std::endl; |
| |
| MatrixXd mat2(size, size); |
| mat2.topLeftCorner(size/2, size/2).setZero(); |
| mat2.topRightCorner(size/2, size/2).setIdentity(); |
| mat2.bottomLeftCorner(size/2, size/2).setIdentity(); |
| mat2.bottomRightCorner(size/2, size/2).setZero(); |
| std::cout << mat2 << std::endl << std::endl; |
| |
| MatrixXd mat3(size, size); |
| mat3 << MatrixXd::Zero(size/2, size/2), MatrixXd::Identity(size/2, size/2), |
| MatrixXd::Identity(size/2, size/2), MatrixXd::Zero(size/2, size/2); |
| std::cout << mat3 << std::endl; |
| |