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21 lines
395 B
C++
21 lines
395 B
C++
#include <unsupported/Eigen/MatrixFunctions>
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#include <iostream>
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int main()
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{
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Eigen::Matrix4d A;
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A << 0, 0, 2, 3,
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0, 0, 4, 5,
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0, 0, 6, 7,
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0, 0, 8, 9;
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std::cout << A.pow(0.37) << std::endl;
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// The 1 makes eigenvalue 0 non-semisimple.
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A.coeffRef(0, 1) = 1;
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// This fails if EIGEN_NO_DEBUG is undefined.
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std::cout << A.pow(0.37) << std::endl;
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return 0;
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}
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