update

1 files changed, 18 insertions, 0 deletions

diff --git a/eigen/doc/examples/Tutorial_BlockOperations_block_assignment.cpp b/eigen/doc/examples/Tutorial_BlockOperations_block_assignment.cpp
new file mode 100644
index 0000000..76f49f2
--- /dev/null
+++ b/eigen/doc/examples/Tutorial_BlockOperations_block_assignment.cpp
@@ -0,0 +1,18 @@
+#include <Eigen/Dense>
+#include <iostream>
+
+using namespace std;
+using namespace Eigen;
+
+int main()
+{
+  Array22f m;
+  m << 1,2,
+       3,4;
+  Array44f a = Array44f::Constant(0.6);
+  cout << "Here is the array a:" << endl << a << endl << endl;
+  a.block<2,2>(1,1) = m;
+  cout << "Here is now a with m copied into its central 2x2 block:" << endl << a << endl << endl;
+  a.block(0,0,2,3) = a.block(2,1,2,3);
+  cout << "Here is now a with bottom-right 2x3 block copied into top-left 2x2 block:" << endl << a << endl << endl;
+}