Attachment 349 Details for Bug 579 – implementation example of partial fixed-size blocks

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[patch] implementation example of partial fixed-size blocks

partial_block_example.diff (text/plain), 2.06 KB, created by Gael Guennebaud on 2013-06-17 21:44:59 UTC

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Creator: Gael Guennebaud

Created: 2013-06-17 21:44:59 UTC

Size: 2.06 KB

patch

obsolete

>diff --git a/Eigen/src/plugins/BlockMethods.h b/Eigen/src/plugins/BlockMethods.h
>--- a/Eigen/src/plugins/BlockMethods.h
>+++ b/Eigen/src/plugins/BlockMethods.h
>@@ -540,16 +540,44 @@ inline Block<Derived, BlockRows, BlockCo
> 
> /** This is the const version of block<>(Index, Index). */
> template<int BlockRows, int BlockCols>
> inline const Block<const Derived, BlockRows, BlockCols> block(Index startRow, Index startCol) const
> {
>   return Block<const Derived, BlockRows, BlockCols>(derived(), startRow, startCol);
> }
> 
>+/** \returns a partial fixed-size expression of a block in *this.
>+  *
>+  * The template parameters \a BlockRows and \a BlockCols are the number of
>+  * rows and columns in the block. One of them is supposed to be \a Dynamic.
>+  *
>+  * \param startRow the first row in the block
>+  * \param startCol the first column in the block
>+  * \param blockRows the number of rows in the block
>+  * \param blockCols the number of columns in the block
>+  *
>+  * \note since block is a templated member, the keyword template has to be used
>+  * if the matrix type is also a template parameter: \code m.template block<3,Dynamic>(1,1,3,n); \endcode
>+  *
>+  * \sa class Block, block(Index,Index,Index,Index), block<>(Index,Index)
>+  */
>+template<int BlockRows, int BlockCols>
>+inline Block<Derived, BlockRows, BlockCols> block(Index startRow, Index startCol, Index numRows, Index numCols)
>+{
>+  return Block<Derived, BlockRows, BlockCols>(derived(), startRow, startCol, numRows, numCols);
>+}
>+
>+/** This is the const version of block<>(Index, Index, Index, Index). */
>+template<int BlockRows, int BlockCols>
>+inline const Block<const Derived, BlockRows, BlockCols> block(Index startRow, Index startCol, Index numRows, Index numCols) const
>+{
>+  return Block<const Derived, BlockRows, BlockCols>(derived(), startRow, startCol, numRows, numCols);
>+}
>+
> /** \returns an expression of the \a i-th column of *this. Note that the numbering starts at 0.
>   *
>   * Example: \include MatrixBase_col.cpp
>   * Output: \verbinclude MatrixBase_col.out
>   *
>   * \sa row(), class Block */
> inline ColXpr col(Index i)
> {

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