update

1 files changed, 5 insertions, 0 deletions

diff --git a/eigen/doc/snippets/MatrixBase_fixedBlock_int_int.cpp b/eigen/doc/snippets/MatrixBase_fixedBlock_int_int.cpp
new file mode 100644
index 0000000..3201127
--- /dev/null
+++ b/eigen/doc/snippets/MatrixBase_fixedBlock_int_int.cpp
@@ -0,0 +1,5 @@
+Matrix4d m = Vector4d(1,2,3,4).asDiagonal();
+cout << "Here is the matrix m:" << endl << m << endl;
+cout << "Here is m.fixed<2, 2>(2, 2):" << endl << m.block<2, 2>(2, 2) << endl;
+m.block<2, 2>(2, 0) = m.block<2, 2>(2, 2);
+cout << "Now the matrix m is:" << endl << m << endl;