From 403e672587826873e8b13bd21b727cdc53256ee2 Mon Sep 17 00:00:00 2001
From: Jitse Niesen <jitse@maths.leeds.ac.uk>
Date: Thu, 22 Jul 2010 15:53:21 +0100
Subject: Extend tutorial page 5: Advanced initialization.

---
 .../Tutorial_AdvancedInitialization_Block.cpp        |  5 +++++
 ...utorial_AdvancedInitialization_CommaTemporary.cpp |  4 ++++
 .../Tutorial_AdvancedInitialization_LinSpaced.cpp    |  7 +++++++
 .../Tutorial_AdvancedInitialization_ThreeWays.cpp    | 20 ++++++++++++++++++++
 .../Tutorial_AdvancedInitialization_Zero.cpp         | 13 +++++++++++++
 doc/snippets/Tutorial_commainit_01b.cpp              |  5 +++++
 6 files changed, 54 insertions(+)
 create mode 100644 doc/snippets/Tutorial_AdvancedInitialization_Block.cpp
 create mode 100644 doc/snippets/Tutorial_AdvancedInitialization_CommaTemporary.cpp
 create mode 100644 doc/snippets/Tutorial_AdvancedInitialization_LinSpaced.cpp
 create mode 100644 doc/snippets/Tutorial_AdvancedInitialization_ThreeWays.cpp
 create mode 100644 doc/snippets/Tutorial_AdvancedInitialization_Zero.cpp
 create mode 100644 doc/snippets/Tutorial_commainit_01b.cpp

(limited to 'doc/snippets')

diff --git a/doc/snippets/Tutorial_AdvancedInitialization_Block.cpp b/doc/snippets/Tutorial_AdvancedInitialization_Block.cpp
new file mode 100644
index 000000000..96e40acfb
--- /dev/null
+++ b/doc/snippets/Tutorial_AdvancedInitialization_Block.cpp
@@ -0,0 +1,5 @@
+MatrixXf matA(2, 2);
+matA << 1, 2, 3, 4;
+MatrixXf matB(4, 4);
+matB << matA, matA/10, matA/10, matA;
+std::cout << matB << std::endl;
diff --git a/doc/snippets/Tutorial_AdvancedInitialization_CommaTemporary.cpp b/doc/snippets/Tutorial_AdvancedInitialization_CommaTemporary.cpp
new file mode 100644
index 000000000..50cff4cb6
--- /dev/null
+++ b/doc/snippets/Tutorial_AdvancedInitialization_CommaTemporary.cpp
@@ -0,0 +1,4 @@
+MatrixXf mat = MatrixXf::Random(2, 3);
+std::cout << mat << std::endl << std::endl;
+mat = (MatrixXf(2,2) << 0, 1, 1, 0).finished() * mat;
+std::cout << mat << std::endl;
diff --git a/doc/snippets/Tutorial_AdvancedInitialization_LinSpaced.cpp b/doc/snippets/Tutorial_AdvancedInitialization_LinSpaced.cpp
new file mode 100644
index 000000000..c6a73ab8c
--- /dev/null
+++ b/doc/snippets/Tutorial_AdvancedInitialization_LinSpaced.cpp
@@ -0,0 +1,7 @@
+ArrayXXf table(10, 4);
+table.col(0) = ArrayXf::LinSpaced(10, 0, 90);
+table.col(1) = M_PI / 180 * table.col(0);
+table.col(2) = table.col(1).sin();
+table.col(3) = table.col(1).cos();
+std::cout << "  Degrees   Radians      Sine    Cosine\n";
+std::cout << table << std::endl;
diff --git a/doc/snippets/Tutorial_AdvancedInitialization_ThreeWays.cpp b/doc/snippets/Tutorial_AdvancedInitialization_ThreeWays.cpp
new file mode 100644
index 000000000..cb7457652
--- /dev/null
+++ b/doc/snippets/Tutorial_AdvancedInitialization_ThreeWays.cpp
@@ -0,0 +1,20 @@
+const int size = 6;
+MatrixXd mat1(size, size);
+mat1.topLeftCorner(size/2, size/2)     = MatrixXd::Zero(size/2, size/2);
+mat1.topRightCorner(size/2, size/2)    = MatrixXd::Identity(size/2, size/2);
+mat1.bottomLeftCorner(size/2, size/2)  = MatrixXd::Identity(size/2, size/2);
+mat1.bottomRightCorner(size/2, size/2) = MatrixXd::Zero(size/2, size/2);
+std::cout << mat1 << std::endl << std::endl;
+
+MatrixXd mat2(size, size);
+mat2.topLeftCorner(size/2, size/2).setZero();
+mat2.topRightCorner(size/2, size/2).setIdentity();
+mat2.bottomLeftCorner(size/2, size/2).setIdentity();
+mat2.bottomRightCorner(size/2, size/2).setZero();
+std::cout << mat2 << std::endl << std::endl;
+
+MatrixXd mat3(size, size);
+mat3 << MatrixXd::Zero(size/2, size/2), MatrixXd::Identity(size/2, size/2),
+        MatrixXd::Identity(size/2, size/2), MatrixXd::Zero(size/2, size/2);
+std::cout << mat3 << std::endl;
+
diff --git a/doc/snippets/Tutorial_AdvancedInitialization_Zero.cpp b/doc/snippets/Tutorial_AdvancedInitialization_Zero.cpp
new file mode 100644
index 000000000..76a36a319
--- /dev/null
+++ b/doc/snippets/Tutorial_AdvancedInitialization_Zero.cpp
@@ -0,0 +1,13 @@
+std::cout << "A fixed-size array:\n";
+Array33f a1 = Array33f::Zero();
+std::cout << a1 << "\n\n";
+
+
+std::cout << "A one-dimensional dynamic-size array:\n";
+ArrayXf a2 = ArrayXf::Zero(3);
+std::cout << a2 << "\n\n";
+
+
+std::cout << "A two-dimensional dynamic-size array:\n";
+ArrayXXf a3 = ArrayXXf::Zero(3, 4);
+std::cout << a3 << "\n";
diff --git a/doc/snippets/Tutorial_commainit_01b.cpp b/doc/snippets/Tutorial_commainit_01b.cpp
new file mode 100644
index 000000000..2adb2e213
--- /dev/null
+++ b/doc/snippets/Tutorial_commainit_01b.cpp
@@ -0,0 +1,5 @@
+Matrix3f m;
+m.row(0) << 1, 2, 3;
+m.block(1,0,2,2) << 4, 5, 7, 8;
+m.col(2).tail(2) << 6, 9;		    
+std::cout << m;
-- 
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