From 2b20da624a4967334fbf18209a2bbec7b5605d49 Mon Sep 17 00:00:00 2001
From: Benoit Jacob <jacob.benoit.1@gmail.com>
Date: Sat, 6 Dec 2008 22:21:29 +0000
Subject: * improvements in the tutorial: triangular matrices, linear algebra *
 minor fixes in Part and StaticAssert * EulerAngles: remove the FIXME as I
 think the current version is fine

---
 doc/QuickStartGuide.dox | 32 +++++++++++++++++++++++++++++++-
 1 file changed, 31 insertions(+), 1 deletion(-)

(limited to 'doc/QuickStartGuide.dox')

diff --git a/doc/QuickStartGuide.dox b/doc/QuickStartGuide.dox
index d9f7d4b61..aa40606ed 100644
--- a/doc/QuickStartGuide.dox
+++ b/doc/QuickStartGuide.dox
@@ -507,7 +507,37 @@ vec1.normalize();\endcode
 
 <a href="#" class="top">top</a>\section TutorialCoreTriangularMatrix Dealing with triangular matrices
 
-todo
+Read/write access to special parts of a matrix can be achieved. See \link MatrixBase::part() const this \endlink for read access and \link MatrixBase::part() this \endlink for write access..
+
+<table class="tutorial_code">
+<tr><td>
+Extract triangular matrices \n from a given matrix m:
+</td><td>\code
+m.part<Eigen::Upper>()
+m.part<Eigen::StrictlyUpper>()
+m.part<Eigen::UnitUpper>()
+m.part<Eigen::Lower>()
+m.part<Eigen::StrictlyLower>()
+m.part<Eigen::UnitLower>()\endcode
+</td></tr>
+<tr><td>
+Write to triangular parts \n of a matrix m:
+</td><td>\code
+m1.part<Eigen::Upper>() = m2;
+m1.part<Eigen::StrictlyUpper>() = m2;
+m1.part<Eigen::Lower>() = m2;
+m1.part<Eigen::StrictlyLower>() = m2;\endcode
+</td></tr>
+<tr><td>
+Special: take advantage of symmetry \n (selfadjointness) when copying \n an expression into a matrix
+</td><td>\code
+m.part<Eigen::SelfAdjoint>() = someSelfadjointMatrix;
+m1.part<Eigen::SelfAdjoint>() = m2 + m2.adjoint(); // m2 + m2.adjoint() is selfadjoint \endcode
+</td></tr>
+
+
+</table>
+
 
 <a href="#" class="top">top</a>\section TutorialCoreSpecialTopics Special Topics
 
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