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#include <Eigen/Dense>
#include <iostream>
using namespace Eigen;
void copyUpperTriangularPart(MatrixXf& dst, const MatrixXf& src)
{
dst.triangularView<Upper>() = src.triangularView<Upper>();
}
int main()
{
MatrixXf m1 = MatrixXf::Ones(4,4);
MatrixXf m2 = MatrixXf::Random(4,4);
std::cout << "m2 before copy:" << std::endl;
std::cout << m2 << std::endl << std::endl;
copyUpperTriangularPart(m2, m1);
std::cout << "m2 after copy:" << std::endl;
std::cout << m2 << std::endl << std::endl;
}
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