exercise_2/colmap-build/eigen-eigen-323c052e1731/doc/snippets/DirectionWise_replicate.cpp

MatrixXi m = MatrixXi::Random(2,3);
cout << "Here is the matrix m:" << endl << m << endl;
cout << "m.colwise().replicate<3>() = ..." << endl;
cout << m.colwise().replicate<3>() << endl;