Disabled external gits

cs440-acg/ext/eigen/doc/TutorialReshapeSlicing.dox

@@ -0,0 +1,65 @@
+namespace Eigen {
+
+/** \eigenManualPage TutorialReshapeSlicing Reshape and Slicing
+
+%Eigen does not expose convenient methods to take slices or to reshape a matrix yet.
+Nonetheless, such features can easily be emulated using the Map class.
+
+\eigenAutoToc
+
+\section TutorialReshape Reshape
+
+A reshape operation consists in modifying the sizes of a matrix while keeping the same coefficients.
+Instead of modifying the input matrix itself, which is not possible for compile-time sizes, the approach consist in creating a different \em view on the storage using class Map.
+Here is a typical example creating a 1D linear view of a matrix:
+
+<table class="example">
+<tr><th>Example:</th><th>Output:</th></tr>
+<tr><td>
+\include Tutorial_ReshapeMat2Vec.cpp
+</td>
+<td>
+\verbinclude Tutorial_ReshapeMat2Vec.out
+</td></tr></table>
+
+Remark how the storage order of the input matrix modifies the order of the coefficients in the linear view.
+Here is another example reshaping a 2x6 matrix to a 6x2 one:
+<table class="example">
+<tr><th>Example:</th><th>Output:</th></tr>
+<tr><td>
+\include Tutorial_ReshapeMat2Mat.cpp
+</td>
+<td>
+\verbinclude Tutorial_ReshapeMat2Mat.out
+</td></tr></table>
+
+
+
+\section TutorialSlicing Slicing
+
+Slicing consists in taking a set of rows, columns, or elements, uniformly spaced within a matrix.
+Again, the class Map allows to easily mimic this feature.
+
+For instance, one can skip every P elements in a vector:
+<table class="example">
+<tr><th>Example:</th><th>Output:</th></tr>
+<tr><td>
+\include Tutorial_SlicingVec.cpp
+</td>
+<td>
+\verbinclude Tutorial_SlicingVec.out
+</td></tr></table>
+
+One can olso take one column over three using an adequate outer-stride or inner-stride depending on the actual storage order:
+<table class="example">
+<tr><th>Example:</th><th>Output:</th></tr>
+<tr><td>
+\include Tutorial_SlicingCol.cpp
+</td>
+<td>
+\verbinclude Tutorial_SlicingCol.out
+</td></tr></table>
+
+*/
+
+}