update

1 files changed, 13 insertions, 0 deletions

diff --git a/eigen/doc/snippets/Tutorial_solve_reuse_decomposition.cpp b/eigen/doc/snippets/Tutorial_solve_reuse_decomposition.cpp
new file mode 100644
index 0000000..3ca0645
--- /dev/null
+++ b/eigen/doc/snippets/Tutorial_solve_reuse_decomposition.cpp
@@ -0,0 +1,13 @@
+Matrix3f A(3,3);
+A << 1,2,3,  4,5,6,  7,8,10;
+PartialPivLU<Matrix3f> luOfA(A); // compute LU decomposition of A
+Vector3f b;
+b << 3,3,4;
+Vector3f x;
+x = luOfA.solve(b);
+cout << "The solution with right-hand side (3,3,4) is:" << endl;
+cout << x << endl;
+b << 1,1,1;
+x = luOfA.solve(b);
+cout << "The solution with right-hand side (1,1,1) is:" << endl;
+cout << x << endl;