Variance accumulator class. More...
#include <variance.hh>
Public Types | |
| typedef T | argument |
| typedef Accumulator< void > | category |
| typedef variance< T, S, R > | exact_t |
| typedef R | q_result |
| typedef R | result |
Public Member Functions | |
| bool | is_valid () const |
| Check whether this accu is able to return a result. | |
| R | mean () const |
| Get the mean value. | |
| unsigned | n_items () const |
| Get the number of items. | |
| R | standard_deviation () const |
| Get the standard deviation value. | |
| R | subj_ () |
| S | sum () const |
| Get the sum value. | |
| void | take_as_init (const T &t) |
Take as initialization the value t. | |
| void | take_as_init_ (const T &t) |
| Default implementation of "take as initialization". | |
| void | take_n_times (unsigned n, const T &t) |
Take n times the value t. | |
| void | take_n_times_ (unsigned n, const T &t) |
| Default implementation of "take n times". | |
| R | to_result () const |
| Get the accumulator result (the variance value). | |
| R | var () const |
| Get the variance value. | |
| variance () | |
| void | init () |
| Manipulators. | |
| void | take_as_init (const argument &t) |
| void | take (const argument &t) |
| void | take (const variance< T, S, R > &other) |
| void | take (unsigned n_times, const argument &t) |
Protected Attributes | |
| unsigned | n_ |
| S | sum2_ |
| S | sum_ |
Detailed Description
template<typename T, typename S = typename mln::value::props< T >::sum, typename R = S>
struct mln::accu::stat::variance< T, S, R >
Variance accumulator class.
Parameter T is the type of values that we sum. Parameter S is the type to store the value sum and the sum of value * value; the default type of S is the summation type (property) of T. Parameter R is the type of the mean and variance values; the default type of R is S.
Definition at line 61 of file variance.hh.
Member Typedef Documentation
| typedef T mln::accu::stat::variance< T, S, R >::argument |
Definition at line 63 of file variance.hh.
typedef Accumulator<void> mln::Accumulator< variance< T, S, R > >::category [inherited] |
Reimplemented from mln::Proxy< variance< T, S, R > >.
Definition at line 80 of file accumulator.hh.
typedef variance< T, S, R > mln::Object< variance< T, S, R > >::exact_t [inherited] |
typedef R mln::accu::internal::base< R, variance< T, S, R > >::q_result [inherited] |
| typedef R mln::accu::stat::variance< T, S, R >::result |
Reimplemented from mln::accu::internal::base< R, variance< T, S, R > >.
Definition at line 64 of file variance.hh.
Constructor & Destructor Documentation
| mln::accu::stat::variance< T, S, R >::variance | ( | ) | [inline] |
Definition at line 117 of file variance.hh.
References mln::accu::stat::variance< T, S, R >::init().
Member Function Documentation
| void mln::accu::stat::variance< T, S, R >::init | ( | ) | [inline] |
Manipulators.
Definition at line 125 of file variance.hh.
References mln::accu::stat::variance< T, S, R >::n_, mln::accu::stat::variance< T, S, R >::sum2_, mln::accu::stat::variance< T, S, R >::sum_, and mln::literal::zero.
Referenced by mln::accu::stat::variance< T, S, R >::variance().
| bool mln::accu::stat::variance< T, S, R >::is_valid | ( | ) | const [inline] |
Check whether this accu is able to return a result.
Always true here.
Definition at line 229 of file variance.hh.
References mln::accu::stat::variance< T, S, R >::n_.
| R mln::accu::stat::variance< T, S, R >::mean | ( | ) | const [inline] |
Get the mean value.
Definition at line 187 of file variance.hh.
References mln::accu::stat::variance< T, S, R >::n_, mln::accu::stat::variance< T, S, R >::sum_, and mln::literal::zero.
| unsigned mln::accu::stat::variance< T, S, R >::n_items | ( | ) | const [inline] |
Get the number of items.
Definition at line 205 of file variance.hh.
References mln::accu::stat::variance< T, S, R >::n_.
| R mln::accu::stat::variance< T, S, R >::standard_deviation | ( | ) | const [inline] |
Get the standard deviation value.
Definition at line 221 of file variance.hh.
References mln::accu::stat::variance< T, S, R >::to_result().
| R mln::accu::internal::base< R, variance< T, S, R > >::subj_ | ( | ) | [inherited] |
| S mln::accu::stat::variance< T, S, R >::sum | ( | ) | const [inline] |
Get the sum value.
Definition at line 197 of file variance.hh.
References mln::accu::stat::variance< T, S, R >::sum_.
| void mln::accu::stat::variance< T, S, R >::take | ( | const variance< T, S, R > & | other | ) | [inline] |
Definition at line 166 of file variance.hh.
References mln::accu::stat::variance< T, S, R >::n_, mln::accu::stat::variance< T, S, R >::sum2_, and mln::accu::stat::variance< T, S, R >::sum_.
| void mln::accu::stat::variance< T, S, R >::take | ( | unsigned | n_times, | |
| const argument & | t | |||
| ) | [inline] |
Definition at line 144 of file variance.hh.
References mln::accu::stat::variance< T, S, R >::n_, mln::accu::stat::variance< T, S, R >::sum2_, and mln::accu::stat::variance< T, S, R >::sum_.
| void mln::accu::stat::variance< T, S, R >::take | ( | const argument & | t | ) | [inline] |
Definition at line 134 of file variance.hh.
References mln::accu::stat::variance< T, S, R >::n_, mln::accu::stat::variance< T, S, R >::sum2_, and mln::accu::stat::variance< T, S, R >::sum_.
| void mln::accu::stat::variance< T, S, R >::take_as_init | ( | const argument & | t | ) | [inline] |
Definition at line 156 of file variance.hh.
References mln::accu::stat::variance< T, S, R >::n_, mln::accu::stat::variance< T, S, R >::sum2_, and mln::accu::stat::variance< T, S, R >::sum_.
| void mln::Accumulator< variance< T, S, R > >::take_as_init | ( | const T & | t | ) | [inherited] |
Take as initialization the value t.
Dev note: this is a final method; override if needed by take_as_init_ (ending with '_').
| void mln::Accumulator< variance< T, S, R > >::take_as_init_ | ( | const T & | t | ) | [inherited] |
Default implementation of "take as initialization".
| void mln::Accumulator< variance< T, S, R > >::take_n_times | ( | unsigned | n, | |
| const T & | t | |||
| ) | [inherited] |
Take n times the value t.
Dev note: this is a final method; override if needed by take_as_init_ (ending with '_').
| void mln::Accumulator< variance< T, S, R > >::take_n_times_ | ( | unsigned | n, | |
| const T & | t | |||
| ) | [inherited] |
Default implementation of "take n times".
| R mln::accu::stat::variance< T, S, R >::to_result | ( | ) | const [inline] |
Get the accumulator result (the variance value).
Definition at line 176 of file variance.hh.
References mln::accu::stat::variance< T, S, R >::n_, mln::accu::stat::variance< T, S, R >::sum2_, and mln::accu::stat::variance< T, S, R >::sum_.
Referenced by mln::accu::stat::variance< T, S, R >::standard_deviation(), and mln::accu::stat::variance< T, S, R >::var().
| R mln::accu::stat::variance< T, S, R >::var | ( | ) | const [inline] |
Get the variance value.
Definition at line 213 of file variance.hh.
References mln::accu::stat::variance< T, S, R >::to_result().
Member Data Documentation
unsigned mln::accu::stat::variance< T, S, R >::n_ [protected] |
Definition at line 102 of file variance.hh.
Referenced by mln::accu::stat::variance< T, S, R >::init(), mln::accu::stat::variance< T, S, R >::is_valid(), mln::accu::stat::variance< T, S, R >::mean(), mln::accu::stat::variance< T, S, R >::n_items(), mln::accu::stat::variance< T, S, R >::take(), mln::accu::stat::variance< T, S, R >::take_as_init(), and mln::accu::stat::variance< T, S, R >::to_result().
S mln::accu::stat::variance< T, S, R >::sum2_ [protected] |
Definition at line 103 of file variance.hh.
Referenced by mln::accu::stat::variance< T, S, R >::init(), mln::accu::stat::variance< T, S, R >::take(), mln::accu::stat::variance< T, S, R >::take_as_init(), and mln::accu::stat::variance< T, S, R >::to_result().
S mln::accu::stat::variance< T, S, R >::sum_ [protected] |
Definition at line 103 of file variance.hh.
Referenced by mln::accu::stat::variance< T, S, R >::init(), mln::accu::stat::variance< T, S, R >::mean(), mln::accu::stat::variance< T, S, R >::sum(), mln::accu::stat::variance< T, S, R >::take(), mln::accu::stat::variance< T, S, R >::take_as_init(), and mln::accu::stat::variance< T, S, R >::to_result().
