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f54a2a0484
This does the job but it is only a first version. Further plans: improved docs, more tests, improve code by refactoring, add convenience functions for sine, cosine, sinh, cosh, and (eventually) add the matrix logarithm.
24 lines
464 B
C++
24 lines
464 B
C++
#include <unsupported/Eigen/MatrixFunctions>
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using namespace Eigen;
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std::complex<double> expfn(std::complex<double> x, int)
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{
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return std::exp(x);
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}
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int main()
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{
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const double pi = std::acos(-1.0);
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MatrixXd A(3,3);
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A << 0, -pi/4, 0,
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pi/4, 0, 0,
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0, 0, 0;
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std::cout << "The matrix A is:\n" << A << "\n\n";
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MatrixXd B;
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ei_matrix_function(A, expfn, &B);
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std::cout << "The matrix exponential of A is:\n" << B << "\n\n";
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}
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