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path: root/doc/snippets/MatrixBase_extract.cpp
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Matrix3i m = Matrix3i::random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is the upper-triangular matrix extracted from m:" << endl
     << m.extract<Eigen::Upper>() << endl;
cout << "Here is the strictly-upper-triangular matrix extracted from m:" << endl
     << m.extract<Eigen::StrictlyUpper>() << endl;
cout << "Here is the unit-lower-triangular matrix extracted from m:" << endl
     << m.extract<Eigen::UnitLower>() << endl;