4 cout
<< "Comparing m with identity matrix:" << endl
;
5 cout
<< m
.cwiseNotEqual(MatrixXi::Identity(2,2)) << endl
;
6 int count
= m
.cwiseNotEqual(MatrixXi::Identity(2,2)).count();
7 cout
<< "Number of coefficients that are not equal: " << count
<< endl
;