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1 | #include <Eigen/Dense>
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2 | #include <iostream>
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3 |
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4 | using namespace Eigen;
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5 |
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6 | template <typename Derived1, typename Derived2>
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7 | void copyUpperTriangularPart(MatrixBase<Derived1>& dst, const MatrixBase<Derived2>& src)
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8 | {
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9 | /* Note the 'template' keywords in the following line! */
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10 | dst.template triangularView<Upper>() = src.template triangularView<Upper>();
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11 | }
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12 |
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13 | int main()
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14 | {
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15 | MatrixXi m1 = MatrixXi::Ones(5,5);
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16 | MatrixXi m2 = MatrixXi::Random(4,4);
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17 | std::cout << "m2 before copy:" << std::endl;
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18 | std::cout << m2 << std::endl << std::endl;
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19 | copyUpperTriangularPart(m2, m1.topLeftCorner(4,4));
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20 | std::cout << "m2 after copy:" << std::endl;
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21 | std::cout << m2 << std::endl << std::endl;
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22 | }
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