eigen/MatrixBase__cwiseEqual_8cpp_source.html

 MatrixXi m(2,2);

 m << 1, 0,

      1, 1;

 cout << "Comparing m with identity matrix:" << endl;

 cout << m.cwiseEqual(MatrixXi::Identity(2,2)) << endl;

 Index count = m.cwiseEqual(MatrixXi::Identity(2,2)).count();

 cout << "Number of coefficients that are equal: " << count << endl;

m
MatrixXi m(2, 2)

Eigen::MatrixXi
Matrix< int, Dynamic, Dynamic > MatrixXi
Dynamic×Dynamic matrix of type int.
Definition: Matrix.h:500

Eigen::Index
EIGEN_DEFAULT_DENSE_INDEX_TYPE Index
The Index type as used for the API.
Definition: Meta.h:82