update

1 files changed, 17 insertions, 0 deletions

diff --git a/eigen/doc/examples/Tutorial_BlockOperations_colrow.cpp b/eigen/doc/examples/Tutorial_BlockOperations_colrow.cpp
new file mode 100644
index 0000000..2e7eb00
--- /dev/null
+++ b/eigen/doc/examples/Tutorial_BlockOperations_colrow.cpp
@@ -0,0 +1,17 @@
+#include <Eigen/Dense>
+#include <iostream>
+
+using namespace std;
+
+int main()
+{
+  Eigen::MatrixXf m(3,3);
+  m << 1,2,3,
+       4,5,6,
+       7,8,9;
+  cout << "Here is the matrix m:" << endl << m << endl;
+  cout << "2nd Row: " << m.row(1) << endl;
+  m.col(2) += 3 * m.col(0);
+  cout << "After adding 3 times the first column into the third column, the matrix m is:\n";
+  cout << m << endl;
+}