Squashed 'third_party/eigen/' changes from 61d72f6..cf794d3
Change-Id: I9b814151b01f49af6337a8605d0c42a3a1ed4c72
git-subtree-dir: third_party/eigen
git-subtree-split: cf794d3b741a6278df169e58461f8529f43bce5d
diff --git a/doc/snippets/BiCGSTAB_simple.cpp b/doc/snippets/BiCGSTAB_simple.cpp
new file mode 100644
index 0000000..5520f4f
--- /dev/null
+++ b/doc/snippets/BiCGSTAB_simple.cpp
@@ -0,0 +1,11 @@
+ int n = 10000;
+ VectorXd x(n), b(n);
+ SparseMatrix<double> A(n,n);
+ /* ... fill A and b ... */
+ BiCGSTAB<SparseMatrix<double> > solver;
+ solver.compute(A);
+ x = solver.solve(b);
+ std::cout << "#iterations: " << solver.iterations() << std::endl;
+ std::cout << "estimated error: " << solver.error() << std::endl;
+ /* ... update b ... */
+ x = solver.solve(b); // solve again
\ No newline at end of file