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