# boost::numeric::ublas::vector_indirect< V, IA > Class Template Reference

A vector referencing a non continuous subvector of elements given another vector of indices. More...

Inherits vector_expression< vector_indirect< V, IA > >.

List of all members.

## Classes
class | const_iterator
class | iterator
## Public Types
typedef const V | const_vector_type
typedef V | vector_type
typedef const IA | const_indirect_array_type
typedef IA | indirect_array_type
typedef V::size_type | size_type
typedef V::difference_type | difference_type
typedef V::value_type | value_type
typedef V::const_reference | const_reference
typedef boost::mpl::if_ < boost::is_const< V > , typename V::const_reference, typename V::reference >::type | reference
typedef boost::mpl::if_ < boost::is_const< V > , typename V::const_closure_type, typename V::closure_type > ::type | vector_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 V::storage_category, dense_proxy_tag > ::storage_category | storage_category
typedef reverse_iterator_base < const_iterator > | const_reverse_iterator
typedef reverse_iterator_base < iterator > | reverse_iterator
## Public Member Functions
BOOST_UBLAS_INLINE | vector_indirect (vector_type &data, size_type size)
BOOST_UBLAS_INLINE | vector_indirect (vector_type &data, const indirect_array_type &ia)
BOOST_UBLAS_INLINE | vector_indirect (const vector_closure_type &data, const indirect_array_type &ia, int)
BOOST_UBLAS_INLINE size_type | size () const
BOOST_UBLAS_INLINE const_indirect_array_type & | indirect () const
BOOST_UBLAS_INLINE indirect_array_type & | indirect ()
BOOST_UBLAS_INLINE const vector_closure_type & | data () const
BOOST_UBLAS_INLINE vector_closure_type & | data ()
BOOST_UBLAS_INLINE const_reference | operator() (size_type i) const
BOOST_UBLAS_INLINE reference | operator() (size_type i)
BOOST_UBLAS_INLINE const_reference | operator[] (size_type i) const
BOOST_UBLAS_INLINE reference | operator[] (size_type i)
BOOST_UBLAS_INLINE vector_indirect< vector_type, indirect_array_type > | project (const range_type &r) const
BOOST_UBLAS_INLINE vector_indirect< vector_type, indirect_array_type > | project (const slice_type &s) const
BOOST_UBLAS_INLINE vector_indirect< vector_type, indirect_array_type > | project (const indirect_array_type &ia) const
BOOST_UBLAS_INLINE vector_indirect & | operator= (const vector_indirect &vi)
BOOST_UBLAS_INLINE vector_indirect & | assign_temporary (vector_indirect &vi)
template<class AE >
BOOST_UBLAS_INLINE vector_indirect & | operator= (const vector_expression< AE > &ae)
template<class AE >
BOOST_UBLAS_INLINE vector_indirect & | assign (const vector_expression< AE > &ae)
template<class AE >
BOOST_UBLAS_INLINE vector_indirect & | operator+= (const vector_expression< AE > &ae)
template<class AE >
BOOST_UBLAS_INLINE vector_indirect & | plus_assign (const vector_expression< AE > &ae)
template<class AE >
BOOST_UBLAS_INLINE vector_indirect & | operator-= (const vector_expression< AE > &ae)
template<class AE >
BOOST_UBLAS_INLINE vector_indirect & | minus_assign (const vector_expression< AE > &ae)
template<class AT >
BOOST_UBLAS_INLINE vector_indirect & | operator*= (const AT &at)
template<class AT >
BOOST_UBLAS_INLINE vector_indirect & | operator/= (const AT &at)
BOOST_UBLAS_INLINE bool | same_closure (const vector_indirect &vr) const
BOOST_UBLAS_INLINE bool | operator== (const vector_indirect &vi) const
BOOST_UBLAS_INLINE void | swap (vector_indirect vi)
BOOST_UBLAS_INLINE const_iterator | find (size_type i) const
BOOST_UBLAS_INLINE iterator | find (size_type i)
BOOST_UBLAS_INLINE const_iterator | begin () const
BOOST_UBLAS_INLINE const_iterator | end () const
BOOST_UBLAS_INLINE iterator | begin ()
BOOST_UBLAS_INLINE iterator | end ()
BOOST_UBLAS_INLINE const_reverse_iterator | rbegin () const
BOOST_UBLAS_INLINE const_reverse_iterator | rend () const
BOOST_UBLAS_INLINE reverse_iterator | rbegin ()
BOOST_UBLAS_INLINE reverse_iterator | rend ()
## Friends
BOOST_UBLAS_INLINE friend void | swap (vector_indirect vi1, vector_indirect vi2)

## Detailed Description

### template<class V, class IA>
class boost::numeric::ublas::vector_indirect< V, IA >

It is the most general version of any subvectors because it uses another vector of indices to reference the subvector.

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

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

Template Parameters:

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