# boost::numeric::ublas::mapped_vector< T, A > Class Template Reference

Index map based sparse vector. More...

Inherits vector_container< mapped_vector< T, A > >.

List of all members.

## Classes
class | const_iterator
class | iterator
## Public Types
typedef A::size_type | size_type
typedef A::difference_type | difference_type
typedef T | value_type
typedef A | array_type
typedef const value_type & | const_reference
typedef detail::map_traits< A, T >::reference | reference
typedef const vector_reference < const self_type > | const_closure_type
typedef vector_reference < self_type > | closure_type
typedef self_type | vector_temporary_type
typedef sparse_tag | storage_category
typedef reverse_iterator_base < const_iterator > | const_reverse_iterator
typedef reverse_iterator_base < iterator > | reverse_iterator
## Public Member Functions
BOOST_UBLAS_INLINE | mapped_vector (size_type size, size_type non_zeros=0)
BOOST_UBLAS_INLINE | mapped_vector (const mapped_vector &v)
template<class AE >
BOOST_UBLAS_INLINE | mapped_vector (const vector_expression< AE > &ae, size_type non_zeros=0)
BOOST_UBLAS_INLINE size_type | size () const
BOOST_UBLAS_INLINE size_type | nnz_capacity () const
BOOST_UBLAS_INLINE size_type | nnz () const
BOOST_UBLAS_INLINE const array_type & | data () const
BOOST_UBLAS_INLINE array_type & | data ()
BOOST_UBLAS_INLINE void | resize (size_type size, bool preserve=true)
BOOST_UBLAS_INLINE void | reserve (size_type non_zeros=0, bool preserve=true)
BOOST_UBLAS_INLINE pointer | find_element (size_type i)
BOOST_UBLAS_INLINE const_pointer | find_element (size_type i) const
BOOST_UBLAS_INLINE const_reference | operator() (size_type i) const
BOOST_UBLAS_INLINE true_reference | ref (size_type i)
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 true_reference | insert_element (size_type i, const_reference t)
BOOST_UBLAS_INLINE void | erase_element (size_type i)
BOOST_UBLAS_INLINE void | clear ()
BOOST_UBLAS_INLINE mapped_vector & | operator= (const mapped_vector &v)
template<class C >
BOOST_UBLAS_INLINE mapped_vector & | operator= (const vector_container< C > &v)
BOOST_UBLAS_INLINE mapped_vector & | assign_temporary (mapped_vector &v)
template<class AE >
BOOST_UBLAS_INLINE mapped_vector & | operator= (const vector_expression< AE > &ae)
template<class AE >
BOOST_UBLAS_INLINE mapped_vector & | assign (const vector_expression< AE > &ae)
template<class AE >
BOOST_UBLAS_INLINE mapped_vector & | operator+= (const vector_expression< AE > &ae)
template<class C >
BOOST_UBLAS_INLINE mapped_vector & | operator+= (const vector_container< C > &v)
template<class AE >
BOOST_UBLAS_INLINE mapped_vector & | plus_assign (const vector_expression< AE > &ae)
template<class AE >
BOOST_UBLAS_INLINE mapped_vector & | operator-= (const vector_expression< AE > &ae)
template<class C >
BOOST_UBLAS_INLINE mapped_vector & | operator-= (const vector_container< C > &v)
template<class AE >
BOOST_UBLAS_INLINE mapped_vector & | minus_assign (const vector_expression< AE > &ae)
template<class AT >
BOOST_UBLAS_INLINE mapped_vector & | operator*= (const AT &at)
template<class AT >
BOOST_UBLAS_INLINE mapped_vector & | operator/= (const AT &at)
BOOST_UBLAS_INLINE void | swap (mapped_vector &v)
const_iterator | find (size_type i) const
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 ()
template<class Archive >
void | serialize (Archive &ar, const unsigned int)
## Friends
BOOST_UBLAS_INLINE friend void | swap (mapped_vector &v1, mapped_vector &v2)

## Detailed Description

### template<class T, class A>
class boost::numeric::ublas::mapped_vector< T, A >

A sparse vector of values of type T of variable size. The sparse storage type A can be `std::map<size_t, T>` or `map_array<size_t, T>`. This means that only non-zero elements are effectively stored.

For a -dimensional sparse vector, and 0 <= i < n the non-zero elements are mapped to consecutive elements of the associative container, i.e. for elements and of the container, holds .

Supported parameters for the adapted array are `map_array<std::size_t, T>` and `map_std<std::size_t, T>`. The latter is equivalent to `std::map<std::size_t, T>`.

Template Parameters:

  | T | the type of object stored in the vector (like double, float, complex, etc...)
  | A | the type of Storage array