mirror of
https://gitlab.com/libeigen/eigen.git
synced 2025-07-07 05:31:48 +08:00
596 lines
20 KiB
C++
596 lines
20 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
|
|
// for linear algebra.
|
|
//
|
|
// Copyright (C) 2008-2010 Gael Guennebaud <gael.guennebaud@inria.fr>
|
|
// Copyright (C) 2006-2010 Benoit Jacob <jacob.benoit.1@gmail.com>
|
|
//
|
|
// Eigen is free software; you can redistribute it and/or
|
|
// modify it under the terms of the GNU Lesser General Public
|
|
// License as published by the Free Software Foundation; either
|
|
// version 3 of the License, or (at your option) any later version.
|
|
//
|
|
// Alternatively, you can redistribute it and/or
|
|
// modify it under the terms of the GNU General Public License as
|
|
// published by the Free Software Foundation; either version 2 of
|
|
// the License, or (at your option) any later version.
|
|
//
|
|
// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public
|
|
// License and a copy of the GNU General Public License along with
|
|
// Eigen. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
#ifndef EIGEN_BLOCKMETHODS_H
|
|
#define EIGEN_BLOCKMETHODS_H
|
|
|
|
#ifndef EIGEN_PARSED_BY_DOXYGEN
|
|
|
|
/** \internal expression type of a column */
|
|
typedef Block<Derived, internal::traits<Derived>::RowsAtCompileTime, 1, !IsRowMajor> ColXpr;
|
|
typedef const Block<const Derived, internal::traits<Derived>::RowsAtCompileTime, 1, !IsRowMajor> ConstColXpr;
|
|
/** \internal expression type of a row */
|
|
typedef Block<Derived, 1, internal::traits<Derived>::ColsAtCompileTime, IsRowMajor> RowXpr;
|
|
typedef const Block<const Derived, 1, internal::traits<Derived>::ColsAtCompileTime, IsRowMajor> ConstRowXpr;
|
|
/** \internal expression type of a block of whole columns */
|
|
typedef Block<Derived, internal::traits<Derived>::RowsAtCompileTime, Dynamic, !IsRowMajor> ColsBlockXpr;
|
|
typedef const Block<const Derived, internal::traits<Derived>::RowsAtCompileTime, Dynamic, !IsRowMajor> ConstColsBlockXpr;
|
|
/** \internal expression type of a block of whole rows */
|
|
typedef Block<Derived, Dynamic, internal::traits<Derived>::ColsAtCompileTime, IsRowMajor> RowsBlockXpr;
|
|
typedef const Block<const Derived, Dynamic, internal::traits<Derived>::ColsAtCompileTime, IsRowMajor> ConstRowsBlockXpr;
|
|
/** \internal expression type of a block of whole columns */
|
|
template<int N> struct NColsBlockXpr { typedef Block<Derived, internal::traits<Derived>::RowsAtCompileTime, N, !IsRowMajor> Type; };
|
|
template<int N> struct ConstNColsBlockXpr { typedef const Block<const Derived, internal::traits<Derived>::RowsAtCompileTime, N, !IsRowMajor> Type; };
|
|
/** \internal expression type of a block of whole rows */
|
|
template<int N> struct NRowsBlockXpr { typedef Block<Derived, N, internal::traits<Derived>::ColsAtCompileTime, IsRowMajor> Type; };
|
|
template<int N> struct ConstNRowsBlockXpr { typedef const Block<const Derived, N, internal::traits<Derived>::ColsAtCompileTime, IsRowMajor> Type; };
|
|
|
|
|
|
#endif // not EIGEN_PARSED_BY_DOXYGEN
|
|
|
|
/** \returns a dynamic-size expression of a block in *this.
|
|
*
|
|
* \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
|
|
*
|
|
* Example: \include MatrixBase_block_int_int_int_int.cpp
|
|
* Output: \verbinclude MatrixBase_block_int_int_int_int.out
|
|
*
|
|
* \note Even though the returned expression has dynamic size, in the case
|
|
* when it is applied to a fixed-size matrix, it inherits a fixed maximal size,
|
|
* which means that evaluating it does not cause a dynamic memory allocation.
|
|
*
|
|
* \sa class Block, block(Index,Index)
|
|
*/
|
|
inline Block<Derived> block(Index startRow, Index startCol, Index blockRows, Index blockCols)
|
|
{
|
|
return Block<Derived>(derived(), startRow, startCol, blockRows, blockCols);
|
|
}
|
|
|
|
/** This is the const version of block(Index,Index,Index,Index). */
|
|
inline const Block<const Derived> block(Index startRow, Index startCol, Index blockRows, Index blockCols) const
|
|
{
|
|
return Block<const Derived>(derived(), startRow, startCol, blockRows, blockCols);
|
|
}
|
|
|
|
|
|
|
|
|
|
/** \returns a dynamic-size expression of a top-right corner of *this.
|
|
*
|
|
* \param cRows the number of rows in the corner
|
|
* \param cCols the number of columns in the corner
|
|
*
|
|
* Example: \include MatrixBase_topRightCorner_int_int.cpp
|
|
* Output: \verbinclude MatrixBase_topRightCorner_int_int.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
inline Block<Derived> topRightCorner(Index cRows, Index cCols)
|
|
{
|
|
return Block<Derived>(derived(), 0, cols() - cCols, cRows, cCols);
|
|
}
|
|
|
|
/** This is the const version of topRightCorner(Index, Index).*/
|
|
inline const Block<const Derived> topRightCorner(Index cRows, Index cCols) const
|
|
{
|
|
return Block<const Derived>(derived(), 0, cols() - cCols, cRows, cCols);
|
|
}
|
|
|
|
/** \returns an expression of a fixed-size top-right corner of *this.
|
|
*
|
|
* The template parameters CRows and CCols are the number of rows and columns in the corner.
|
|
*
|
|
* Example: \include MatrixBase_template_int_int_topRightCorner.cpp
|
|
* Output: \verbinclude MatrixBase_template_int_int_topRightCorner.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
template<int CRows, int CCols>
|
|
inline Block<Derived, CRows, CCols> topRightCorner()
|
|
{
|
|
return Block<Derived, CRows, CCols>(derived(), 0, cols() - CCols);
|
|
}
|
|
|
|
/** This is the const version of topRightCorner<int, int>().*/
|
|
template<int CRows, int CCols>
|
|
inline const Block<const Derived, CRows, CCols> topRightCorner() const
|
|
{
|
|
return Block<const Derived, CRows, CCols>(derived(), 0, cols() - CCols);
|
|
}
|
|
|
|
|
|
|
|
|
|
/** \returns a dynamic-size expression of a top-left corner of *this.
|
|
*
|
|
* \param cRows the number of rows in the corner
|
|
* \param cCols the number of columns in the corner
|
|
*
|
|
* Example: \include MatrixBase_topLeftCorner_int_int.cpp
|
|
* Output: \verbinclude MatrixBase_topLeftCorner_int_int.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
inline Block<Derived> topLeftCorner(Index cRows, Index cCols)
|
|
{
|
|
return Block<Derived>(derived(), 0, 0, cRows, cCols);
|
|
}
|
|
|
|
/** This is the const version of topLeftCorner(Index, Index).*/
|
|
inline const Block<const Derived> topLeftCorner(Index cRows, Index cCols) const
|
|
{
|
|
return Block<const Derived>(derived(), 0, 0, cRows, cCols);
|
|
}
|
|
|
|
/** \returns an expression of a fixed-size top-left corner of *this.
|
|
*
|
|
* The template parameters CRows and CCols are the number of rows and columns in the corner.
|
|
*
|
|
* Example: \include MatrixBase_template_int_int_topLeftCorner.cpp
|
|
* Output: \verbinclude MatrixBase_template_int_int_topLeftCorner.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
template<int CRows, int CCols>
|
|
inline Block<Derived, CRows, CCols> topLeftCorner()
|
|
{
|
|
return Block<Derived, CRows, CCols>(derived(), 0, 0);
|
|
}
|
|
|
|
/** This is the const version of topLeftCorner<int, int>().*/
|
|
template<int CRows, int CCols>
|
|
inline const Block<const Derived, CRows, CCols> topLeftCorner() const
|
|
{
|
|
return Block<const Derived, CRows, CCols>(derived(), 0, 0);
|
|
}
|
|
|
|
|
|
|
|
/** \returns a dynamic-size expression of a bottom-right corner of *this.
|
|
*
|
|
* \param cRows the number of rows in the corner
|
|
* \param cCols the number of columns in the corner
|
|
*
|
|
* Example: \include MatrixBase_bottomRightCorner_int_int.cpp
|
|
* Output: \verbinclude MatrixBase_bottomRightCorner_int_int.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
inline Block<Derived> bottomRightCorner(Index cRows, Index cCols)
|
|
{
|
|
return Block<Derived>(derived(), rows() - cRows, cols() - cCols, cRows, cCols);
|
|
}
|
|
|
|
/** This is the const version of bottomRightCorner(Index, Index).*/
|
|
inline const Block<const Derived> bottomRightCorner(Index cRows, Index cCols) const
|
|
{
|
|
return Block<const Derived>(derived(), rows() - cRows, cols() - cCols, cRows, cCols);
|
|
}
|
|
|
|
/** \returns an expression of a fixed-size bottom-right corner of *this.
|
|
*
|
|
* The template parameters CRows and CCols are the number of rows and columns in the corner.
|
|
*
|
|
* Example: \include MatrixBase_template_int_int_bottomRightCorner.cpp
|
|
* Output: \verbinclude MatrixBase_template_int_int_bottomRightCorner.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
template<int CRows, int CCols>
|
|
inline Block<Derived, CRows, CCols> bottomRightCorner()
|
|
{
|
|
return Block<Derived, CRows, CCols>(derived(), rows() - CRows, cols() - CCols);
|
|
}
|
|
|
|
/** This is the const version of bottomRightCorner<int, int>().*/
|
|
template<int CRows, int CCols>
|
|
inline const Block<const Derived, CRows, CCols> bottomRightCorner() const
|
|
{
|
|
return Block<const Derived, CRows, CCols>(derived(), rows() - CRows, cols() - CCols);
|
|
}
|
|
|
|
|
|
|
|
/** \returns a dynamic-size expression of a bottom-left corner of *this.
|
|
*
|
|
* \param cRows the number of rows in the corner
|
|
* \param cCols the number of columns in the corner
|
|
*
|
|
* Example: \include MatrixBase_bottomLeftCorner_int_int.cpp
|
|
* Output: \verbinclude MatrixBase_bottomLeftCorner_int_int.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
inline Block<Derived> bottomLeftCorner(Index cRows, Index cCols)
|
|
{
|
|
return Block<Derived>(derived(), rows() - cRows, 0, cRows, cCols);
|
|
}
|
|
|
|
/** This is the const version of bottomLeftCorner(Index, Index).*/
|
|
inline const Block<const Derived> bottomLeftCorner(Index cRows, Index cCols) const
|
|
{
|
|
return Block<const Derived>(derived(), rows() - cRows, 0, cRows, cCols);
|
|
}
|
|
|
|
/** \returns an expression of a fixed-size bottom-left corner of *this.
|
|
*
|
|
* The template parameters CRows and CCols are the number of rows and columns in the corner.
|
|
*
|
|
* Example: \include MatrixBase_template_int_int_bottomLeftCorner.cpp
|
|
* Output: \verbinclude MatrixBase_template_int_int_bottomLeftCorner.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
template<int CRows, int CCols>
|
|
inline Block<Derived, CRows, CCols> bottomLeftCorner()
|
|
{
|
|
return Block<Derived, CRows, CCols>(derived(), rows() - CRows, 0);
|
|
}
|
|
|
|
/** This is the const version of bottomLeftCorner<int, int>().*/
|
|
template<int CRows, int CCols>
|
|
inline const Block<const Derived, CRows, CCols> bottomLeftCorner() const
|
|
{
|
|
return Block<const Derived, CRows, CCols>(derived(), rows() - CRows, 0);
|
|
}
|
|
|
|
|
|
|
|
/** \returns a block consisting of the top rows of *this.
|
|
*
|
|
* \param n the number of rows in the block
|
|
*
|
|
* Example: \include MatrixBase_topRows_int.cpp
|
|
* Output: \verbinclude MatrixBase_topRows_int.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
inline RowsBlockXpr topRows(Index n)
|
|
{
|
|
return RowsBlockXpr(derived(), 0, 0, n, cols());
|
|
}
|
|
|
|
/** This is the const version of topRows(Index).*/
|
|
inline ConstRowsBlockXpr topRows(Index n) const
|
|
{
|
|
return ConstRowsBlockXpr(derived(), 0, 0, n, cols());
|
|
}
|
|
|
|
/** \returns a block consisting of the top rows of *this.
|
|
*
|
|
* \tparam N the number of rows in the block
|
|
*
|
|
* Example: \include MatrixBase_template_int_topRows.cpp
|
|
* Output: \verbinclude MatrixBase_template_int_topRows.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
template<int N>
|
|
inline typename NRowsBlockXpr<N>::Type topRows()
|
|
{
|
|
return typename NRowsBlockXpr<N>::Type(derived(), 0, 0, N, cols());
|
|
}
|
|
|
|
/** This is the const version of topRows<int>().*/
|
|
template<int N>
|
|
inline typename ConstNRowsBlockXpr<N>::Type topRows() const
|
|
{
|
|
return typename ConstNRowsBlockXpr<N>::Type(derived(), 0, 0, N, cols());
|
|
}
|
|
|
|
|
|
|
|
/** \returns a block consisting of the bottom rows of *this.
|
|
*
|
|
* \param n the number of rows in the block
|
|
*
|
|
* Example: \include MatrixBase_bottomRows_int.cpp
|
|
* Output: \verbinclude MatrixBase_bottomRows_int.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
inline RowsBlockXpr bottomRows(Index n)
|
|
{
|
|
return RowsBlockXpr(derived(), rows() - n, 0, n, cols());
|
|
}
|
|
|
|
/** This is the const version of bottomRows(Index).*/
|
|
inline ConstRowsBlockXpr bottomRows(Index n) const
|
|
{
|
|
return ConstRowsBlockXpr(derived(), rows() - n, 0, n, cols());
|
|
}
|
|
|
|
/** \returns a block consisting of the bottom rows of *this.
|
|
*
|
|
* \tparam N the number of rows in the block
|
|
*
|
|
* Example: \include MatrixBase_template_int_bottomRows.cpp
|
|
* Output: \verbinclude MatrixBase_template_int_bottomRows.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
template<int N>
|
|
inline typename NRowsBlockXpr<N>::Type bottomRows()
|
|
{
|
|
return typename NRowsBlockXpr<N>::Type(derived(), rows() - N, 0, N, cols());
|
|
}
|
|
|
|
/** This is the const version of bottomRows<int>().*/
|
|
template<int N>
|
|
inline typename ConstNRowsBlockXpr<N>::Type bottomRows() const
|
|
{
|
|
return typename ConstNRowsBlockXpr<N>::Type(derived(), rows() - N, 0, N, cols());
|
|
}
|
|
|
|
|
|
|
|
/** \returns a block consisting of a range of rows of *this.
|
|
*
|
|
* \param startRow the index of the first row in the block
|
|
* \param numRows the number of rows in the block
|
|
*
|
|
* Example: \include DenseBase_middleRows_int.cpp
|
|
* Output: \verbinclude DenseBase_middleRows_int.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
inline RowsBlockXpr middleRows(Index startRow, Index numRows)
|
|
{
|
|
return RowsBlockXpr(derived(), startRow, 0, numRows, cols());
|
|
}
|
|
|
|
/** This is the const version of middleRows(Index,Index).*/
|
|
inline ConstRowsBlockXpr middleRows(Index startRow, Index numRows) const
|
|
{
|
|
return ConstRowsBlockXpr(derived(), startRow, 0, numRows, cols());
|
|
}
|
|
|
|
/** \returns a block consisting of a range of rows of *this.
|
|
*
|
|
* \tparam N the number of rows in the block
|
|
* \param startRow the index of the first row in the block
|
|
*
|
|
* Example: \include DenseBase_template_int_middleRows.cpp
|
|
* Output: \verbinclude DenseBase_template_int_middleRows.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
template<int N>
|
|
inline typename NRowsBlockXpr<N>::Type middleRows(Index startRow)
|
|
{
|
|
return typename NRowsBlockXpr<N>::Type(derived(), startRow, 0, N, cols());
|
|
}
|
|
|
|
/** This is the const version of middleRows<int>().*/
|
|
template<int N>
|
|
inline typename ConstNRowsBlockXpr<N>::Type middleRows(Index startRow) const
|
|
{
|
|
return typename ConstNRowsBlockXpr<N>::Type(derived(), startRow, 0, N, cols());
|
|
}
|
|
|
|
|
|
|
|
/** \returns a block consisting of the left columns of *this.
|
|
*
|
|
* \param n the number of columns in the block
|
|
*
|
|
* Example: \include MatrixBase_leftCols_int.cpp
|
|
* Output: \verbinclude MatrixBase_leftCols_int.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
inline ColsBlockXpr leftCols(Index n)
|
|
{
|
|
return ColsBlockXpr(derived(), 0, 0, rows(), n);
|
|
}
|
|
|
|
/** This is the const version of leftCols(Index).*/
|
|
inline ConstColsBlockXpr leftCols(Index n) const
|
|
{
|
|
return ConstColsBlockXpr(derived(), 0, 0, rows(), n);
|
|
}
|
|
|
|
/** \returns a block consisting of the left columns of *this.
|
|
*
|
|
* \tparam N the number of columns in the block
|
|
*
|
|
* Example: \include MatrixBase_template_int_leftCols.cpp
|
|
* Output: \verbinclude MatrixBase_template_int_leftCols.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
template<int N>
|
|
inline typename NColsBlockXpr<N>::Type leftCols()
|
|
{
|
|
return typename NColsBlockXpr<N>::Type(derived(), 0, 0, rows(), N);
|
|
}
|
|
|
|
/** This is the const version of leftCols<int>().*/
|
|
template<int N>
|
|
inline typename ConstNColsBlockXpr<N>::Type leftCols() const
|
|
{
|
|
return typename ConstNColsBlockXpr<N>::Type(derived(), 0, 0, rows(), N);
|
|
}
|
|
|
|
|
|
|
|
/** \returns a block consisting of the right columns of *this.
|
|
*
|
|
* \param n the number of columns in the block
|
|
*
|
|
* Example: \include MatrixBase_rightCols_int.cpp
|
|
* Output: \verbinclude MatrixBase_rightCols_int.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
inline ColsBlockXpr rightCols(Index n)
|
|
{
|
|
return ColsBlockXpr(derived(), 0, cols() - n, rows(), n);
|
|
}
|
|
|
|
/** This is the const version of rightCols(Index).*/
|
|
inline ConstColsBlockXpr rightCols(Index n) const
|
|
{
|
|
return ConstColsBlockXpr(derived(), 0, cols() - n, rows(), n);
|
|
}
|
|
|
|
/** \returns a block consisting of the right columns of *this.
|
|
*
|
|
* \tparam N the number of columns in the block
|
|
*
|
|
* Example: \include MatrixBase_template_int_rightCols.cpp
|
|
* Output: \verbinclude MatrixBase_template_int_rightCols.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
template<int N>
|
|
inline typename NColsBlockXpr<N>::Type rightCols()
|
|
{
|
|
return typename NColsBlockXpr<N>::Type(derived(), 0, cols() - N, rows(), N);
|
|
}
|
|
|
|
/** This is the const version of rightCols<int>().*/
|
|
template<int N>
|
|
inline typename ConstNColsBlockXpr<N>::Type rightCols() const
|
|
{
|
|
return typename ConstNColsBlockXpr<N>::Type(derived(), 0, cols() - N, rows(), N);
|
|
}
|
|
|
|
|
|
|
|
/** \returns a block consisting of a range of columns of *this.
|
|
*
|
|
* \param startCol the index of the first column in the block
|
|
* \param numCols the number of columns in the block
|
|
*
|
|
* Example: \include DenseBase_middleCols_int.cpp
|
|
* Output: \verbinclude DenseBase_middleCols_int.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
inline ColsBlockXpr middleCols(Index startCol, Index numCols)
|
|
{
|
|
return ColsBlockXpr(derived(), 0, startCol, rows(), numCols);
|
|
}
|
|
|
|
/** This is the const version of middleCols(Index,Index).*/
|
|
inline ConstColsBlockXpr middleCols(Index startCol, Index numCols) const
|
|
{
|
|
return ConstColsBlockXpr(derived(), 0, startCol, rows(), numCols);
|
|
}
|
|
|
|
/** \returns a block consisting of a range of columns of *this.
|
|
*
|
|
* \tparam N the number of columns in the block
|
|
* \param startCol the index of the first column in the block
|
|
*
|
|
* Example: \include DenseBase_template_int_middleCols.cpp
|
|
* Output: \verbinclude DenseBase_template_int_middleCols.out
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
template<int N>
|
|
inline typename NColsBlockXpr<N>::Type middleCols(Index startCol)
|
|
{
|
|
return typename NColsBlockXpr<N>::Type(derived(), 0, startCol, rows(), N);
|
|
}
|
|
|
|
/** This is the const version of middleCols<int>().*/
|
|
template<int N>
|
|
inline typename ConstNColsBlockXpr<N>::Type middleCols(Index startCol) const
|
|
{
|
|
return typename ConstNColsBlockXpr<N>::Type(derived(), 0, startCol, rows(), N);
|
|
}
|
|
|
|
|
|
|
|
/** \returns a 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.
|
|
*
|
|
* \param startRow the first row in the block
|
|
* \param startCol the first column in the block
|
|
*
|
|
* Example: \include MatrixBase_block_int_int.cpp
|
|
* Output: \verbinclude MatrixBase_block_int_int.out
|
|
*
|
|
* \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<3,3>(1,1); \endcode
|
|
*
|
|
* \sa class Block, block(Index,Index,Index,Index)
|
|
*/
|
|
template<int BlockRows, int BlockCols>
|
|
inline Block<Derived, BlockRows, BlockCols> block(Index startRow, Index startCol)
|
|
{
|
|
return Block<Derived, BlockRows, BlockCols>(derived(), startRow, startCol);
|
|
}
|
|
|
|
/** 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 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)
|
|
{
|
|
return ColXpr(derived(), i);
|
|
}
|
|
|
|
/** This is the const version of col(). */
|
|
inline ConstColXpr col(Index i) const
|
|
{
|
|
return ConstColXpr(derived(), i);
|
|
}
|
|
|
|
/** \returns an expression of the \a i-th row of *this. Note that the numbering starts at 0.
|
|
*
|
|
* Example: \include MatrixBase_row.cpp
|
|
* Output: \verbinclude MatrixBase_row.out
|
|
*
|
|
* \sa col(), class Block */
|
|
inline RowXpr row(Index i)
|
|
{
|
|
return RowXpr(derived(), i);
|
|
}
|
|
|
|
/** This is the const version of row(). */
|
|
inline ConstRowXpr row(Index i) const
|
|
{
|
|
return ConstRowXpr(derived(), i);
|
|
}
|
|
|
|
#endif // EIGEN_BLOCKMETHODS_H
|