# boost::numeric::ublas::matrix_indirect< M, IA > Class Template Reference

A matrix referencing a non continuous submatrix of elements given another matrix of indices. More...

Inherits matrix_expression< matrix_indirect< M, IA > >.

List of all members.

## Classes
class | const_iterator1
class | const_iterator2
class | iterator1
class | iterator2
## Public Types
typedef M | matrix_type
typedef IA | indirect_array_type
typedef M::size_type | size_type
typedef M::difference_type | difference_type
typedef M::value_type | value_type
typedef M::const_reference | const_reference
typedef boost::mpl::if_ < boost::is_const< M > , typename M::const_reference, typename M::reference >::type | reference
typedef boost::mpl::if_ < boost::is_const< M > , typename M::const_closure_type, typename M::closure_type > ::type | matrix_closure_type
typedef basic_range< size_type, difference_type > | range_type
typedef basic_slice< size_type, difference_type > | slice_type
typedef const self_type | const_closure_type
typedef self_type | closure_type
typedef storage_restrict_traits < typename M::storage_category, dense_proxy_tag > ::storage_category | storage_category
typedef M::orientation_category | orientation_category
typedef reverse_iterator_base1 < const_iterator1 > | const_reverse_iterator1
typedef reverse_iterator_base1 < iterator1 > | reverse_iterator1
typedef reverse_iterator_base2 < const_iterator2 > | const_reverse_iterator2
typedef reverse_iterator_base2 < iterator2 > | reverse_iterator2
## Public Member Functions
BOOST_UBLAS_INLINE | matrix_indirect (matrix_type &data, size_type size1, size_type size2)
BOOST_UBLAS_INLINE | matrix_indirect (matrix_type &data, const indirect_array_type &ia1, const indirect_array_type &ia2)
BOOST_UBLAS_INLINE | matrix_indirect (const matrix_closure_type &data, const indirect_array_type &ia1, const indirect_array_type &ia2, int)
BOOST_UBLAS_INLINE size_type | size1 () const
BOOST_UBLAS_INLINE size_type | size2 () const
BOOST_UBLAS_INLINE const indirect_array_type & | indirect1 () const
BOOST_UBLAS_INLINE indirect_array_type & | indirect1 ()
BOOST_UBLAS_INLINE const indirect_array_type & | indirect2 () const
BOOST_UBLAS_INLINE indirect_array_type & | indirect2 ()
BOOST_UBLAS_INLINE const matrix_closure_type & | data () const
BOOST_UBLAS_INLINE matrix_closure_type & | data ()
BOOST_UBLAS_INLINE const_reference | operator() (size_type i, size_type j) const
BOOST_UBLAS_INLINE reference | operator() (size_type i, size_type j)
BOOST_UBLAS_INLINE matrix_indirect< matrix_type, indirect_array_type > | project (const range_type &r1, const range_type &r2) const
BOOST_UBLAS_INLINE matrix_indirect< matrix_type, indirect_array_type > | project (const slice_type &s1, const slice_type &s2) const
BOOST_UBLAS_INLINE matrix_indirect< matrix_type, indirect_array_type > | project (const indirect_array_type &ia1, const indirect_array_type &ia2) const
BOOST_UBLAS_INLINE matrix_indirect & | operator= (const matrix_indirect &mi)
BOOST_UBLAS_INLINE matrix_indirect & | assign_temporary (matrix_indirect &mi)
template<class AE >
BOOST_UBLAS_INLINE matrix_indirect & | operator= (const matrix_expression< AE > &ae)
template<class AE >
BOOST_UBLAS_INLINE matrix_indirect & | assign (const matrix_expression< AE > &ae)
template<class AE >
BOOST_UBLAS_INLINE matrix_indirect & | operator+= (const matrix_expression< AE > &ae)
template<class AE >
BOOST_UBLAS_INLINE matrix_indirect & | plus_assign (const matrix_expression< AE > &ae)
template<class AE >
BOOST_UBLAS_INLINE matrix_indirect & | operator-= (const matrix_expression< AE > &ae)
template<class AE >
BOOST_UBLAS_INLINE matrix_indirect & | minus_assign (const matrix_expression< AE > &ae)
template<class AT >
BOOST_UBLAS_INLINE matrix_indirect & | operator*= (const AT &at)
template<class AT >
BOOST_UBLAS_INLINE matrix_indirect & | operator/= (const AT &at)
BOOST_UBLAS_INLINE bool | same_closure (const matrix_indirect &mi) const
BOOST_UBLAS_INLINE bool | operator== (const matrix_indirect &mi) const
BOOST_UBLAS_INLINE void | swap (matrix_indirect mi)
BOOST_UBLAS_INLINE const_iterator1 | find1 (int, size_type i, size_type j) const
BOOST_UBLAS_INLINE iterator1 | find1 (int, size_type i, size_type j)
BOOST_UBLAS_INLINE const_iterator2 | find2 (int, size_type i, size_type j) const
BOOST_UBLAS_INLINE iterator2 | find2 (int, size_type i, size_type j)
BOOST_UBLAS_INLINE const_iterator1 | begin1 () const
BOOST_UBLAS_INLINE const_iterator1 | end1 () const
BOOST_UBLAS_INLINE iterator1 | begin1 ()
BOOST_UBLAS_INLINE iterator1 | end1 ()
BOOST_UBLAS_INLINE const_iterator2 | begin2 () const
BOOST_UBLAS_INLINE const_iterator2 | end2 () const
BOOST_UBLAS_INLINE iterator2 | begin2 ()
BOOST_UBLAS_INLINE iterator2 | end2 ()
BOOST_UBLAS_INLINE const_reverse_iterator1 | rbegin1 () const
BOOST_UBLAS_INLINE const_reverse_iterator1 | rend1 () const
BOOST_UBLAS_INLINE reverse_iterator1 | rbegin1 ()
BOOST_UBLAS_INLINE reverse_iterator1 | rend1 ()
BOOST_UBLAS_INLINE const_reverse_iterator2 | rbegin2 () const
BOOST_UBLAS_INLINE const_reverse_iterator2 | rend2 () const
BOOST_UBLAS_INLINE reverse_iterator2 | rbegin2 ()
BOOST_UBLAS_INLINE reverse_iterator2 | rend2 ()
## Friends
BOOST_UBLAS_INLINE friend void | swap (matrix_indirect mi1, matrix_indirect mi2)

## Detailed Description

### template<class M, class IA>
class boost::numeric::ublas::matrix_indirect< M, IA >

It is the most general version of any submatrices because it uses another matrix of indices to reference the submatrix.

The matrix of indices can be of any type with the restriction that its elements must be type-compatible with the size_type `of` the container. In practice, the following are good candidates:

- `boost::numeric::ublas::indirect_array<A>` where `A` can be `int`, `size_t`, `long`, etc...
- `boost::numeric::ublas::matrix<int>` can work too (`int` can be replaced by another integer type)
- etc...

An indirect matrix can be used as a normal matrix in any expression. If the specified indirect matrix falls outside that of the indices of the matrix, then the `matrix_indirect` is not a well formed Matrix Expression and access to an element outside of indices of the matrix is undefined.

Template Parameters:

  | V | the type of the referenced matrix, for example `matrix<double>`)
  | IA | the type of index matrix. Default is `ublas::indirect_array<>`