| 1 | const int size = 6;
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| 2 | MatrixXd mat1(size, size);
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| 3 | mat1.topLeftCorner(size/2, size/2) = MatrixXd::Zero(size/2, size/2);
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| 4 | mat1.topRightCorner(size/2, size/2) = MatrixXd::Identity(size/2, size/2);
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| 5 | mat1.bottomLeftCorner(size/2, size/2) = MatrixXd::Identity(size/2, size/2);
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| 6 | mat1.bottomRightCorner(size/2, size/2) = MatrixXd::Zero(size/2, size/2);
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| 7 | std::cout << mat1 << std::endl << std::endl;
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| 8 |
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| 9 | MatrixXd mat2(size, size);
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| 10 | mat2.topLeftCorner(size/2, size/2).setZero();
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| 11 | mat2.topRightCorner(size/2, size/2).setIdentity();
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| 12 | mat2.bottomLeftCorner(size/2, size/2).setIdentity();
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| 13 | mat2.bottomRightCorner(size/2, size/2).setZero();
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| 14 | std::cout << mat2 << std::endl << std::endl;
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| 15 |
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| 16 | MatrixXd mat3(size, size);
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| 17 | mat3 << MatrixXd::Zero(size/2, size/2), MatrixXd::Identity(size/2, size/2),
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| 18 | MatrixXd::Identity(size/2, size/2), MatrixXd::Zero(size/2, size/2);
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| 19 | std::cout << mat3 << std::endl;
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| 20 |
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