1 Matrix3d m
= Matrix3d::Random();
2 cout
<< "Here is the matrix m:" << endl
<< m
<< endl
;
3 cout
<< "Here is the sum of each column:" << endl
<< m
.colwise().sum() << endl
;
4 cout
<< "Here is the maximum absolute value of each column:"
5 << endl
<< m
.cwiseAbs().colwise().maxCoeff() << endl
;