1 Matrix4d m
= Vector4d(1,2,3,4).asDiagonal();
2 cout
<< "Here is the matrix m:" << endl
<< m
<< endl
;
3 cout
<< "Here is m.fixed<2, 2>(2, 2):" << endl
<< m
.block
<2, 2>(2, 2) << endl
;
4 m
.block
<2, 2>(2, 0) = m
.block
<2, 2>(2, 2);
5 cout
<< "Now the matrix m is:" << endl
<< m
<< endl
;