Squashed 'third_party/eigen/' content from commit 61d72f6
Change-Id: Iccc90fa0b55ab44037f018046d2fcffd90d9d025
git-subtree-dir: third_party/eigen
git-subtree-split: 61d72f6383cfa842868c53e30e087b0258177257
diff --git a/doc/examples/tut_arithmetic_add_sub.cpp b/doc/examples/tut_arithmetic_add_sub.cpp
new file mode 100644
index 0000000..e97477b
--- /dev/null
+++ b/doc/examples/tut_arithmetic_add_sub.cpp
@@ -0,0 +1,22 @@
+#include <iostream>
+#include <Eigen/Dense>
+
+using namespace Eigen;
+
+int main()
+{
+ Matrix2d a;
+ a << 1, 2,
+ 3, 4;
+ MatrixXd b(2,2);
+ b << 2, 3,
+ 1, 4;
+ std::cout << "a + b =\n" << a + b << std::endl;
+ std::cout << "a - b =\n" << a - b << std::endl;
+ std::cout << "Doing a += b;" << std::endl;
+ a += b;
+ std::cout << "Now a =\n" << a << std::endl;
+ Vector3d v(1,2,3);
+ Vector3d w(1,0,0);
+ std::cout << "-v + w - v =\n" << -v + w - v << std::endl;
+}