lar::util::details::DataTracker< PWR, T, W > Class Template Reference

Class tracking sums of variables up to a specified power. More...

#include <StatCollector.h>

Inheritance diagram for lar::util::details::DataTracker< PWR, T, W >:

Public Types
using	Data_t = T
	type of data More...
using	Weight_t = T
	type of weight More...

Public Member Functions
	DataTracker ()
	Default constructor. More...
void	add (Data_t v, Weight_t w)
	Adds the specified weight to the statistics. More...
void	clear ()
	Resets the count. More...
template<unsigned int N>
Weight_t	SumN () const
	Returns the sum of the values to the power N (1 <= N <= 2) More...
Weight_t	Sum (unsigned int n) const
	Returns the sum of the values to the power n (1 <= n <= 2, no check) More...
Weight_t	Sum () const
	Returns the weighted sum of the entries. More...

Static Public Attributes
static constexpr unsigned int	Power = PWR

Protected Attributes
std::array< Weight_t, Power >	sums

Detailed Description

template<unsigned int PWR, typename T, typename W = T>
class lar::util::details::DataTracker< PWR, T, W >

Class tracking sums of variables up to a specified power.

Template Parameters

Power	power up to which to collect statistics
T	type of the quantity
W	type of the weight (as T by default)

Note that statistics of order 0 (that is, pertaining only weights) are not collected.

Definition at line 93 of file StatCollector.h.

Member Typedef Documentation

template<unsigned int PWR, typename T, typename W = T>

using lar::util::details::DataTracker< PWR, T, W >::Data_t = T

type of data

Definition at line 98 of file StatCollector.h.

template<unsigned int PWR, typename T, typename W = T>

using lar::util::details::DataTracker< PWR, T, W >::Weight_t = T

type of weight

Definition at line 99 of file StatCollector.h.

Constructor & Destructor Documentation

template<unsigned int PWR, typename T, typename W = T>

lar::util::details::DataTracker< PWR, T, W >::DataTracker ( )

inline

Default constructor.

Definition at line 102 of file StatCollector.h.

{ clear(); }

Member Function Documentation

template<unsigned int PWR, typename T, typename W = T>

void lar::util::details::DataTracker< PWR, T, W >::add ( Data_t  v, Weight_t  w  )

inline

Adds the specified weight to the statistics.

Definition at line 105 of file StatCollector.h.

          {
            Weight_t x = w;
            for (size_t i = 0; i < Power; ++i) sums[i] += (x *= v);
          }

template<unsigned int PWR, typename T, typename W = T>

void lar::util::details::DataTracker< PWR, T, W >::clear ( )

inline

Resets the count.

Definition at line 112 of file StatCollector.h.

{ sums.fill(Data_t(0)); }

template<unsigned int PWR, typename T, typename W = T>

Weight_t lar::util::details::DataTracker< PWR, T, W >::Sum ( unsigned int  n ) const

inline

Returns the sum of the values to the power n (1 <= n <= 2, no check)

Definition at line 124 of file StatCollector.h.

{ return sums[n - 1]; }

template<unsigned int PWR, typename T, typename W = T>

Weight_t lar::util::details::DataTracker< PWR, T, W >::Sum ( ) const

inline

Returns the weighted sum of the entries.

Definition at line 127 of file StatCollector.h.

{ return SumN<1>(); }

template<unsigned int PWR, typename T, typename W = T>

template<unsigned int N>

Weight_t lar::util::details::DataTracker< PWR, T, W >::SumN ( ) const

inline

Returns the sum of the values to the power N (1 <= N <= 2)

Definition at line 116 of file StatCollector.h.

          {
            static_assert
              ((N > 0) && (N <= Power), "Invalid sum of power requested");
            return sums[N - 1];
          } // SumN()

Member Data Documentation

template<unsigned int PWR, typename T, typename W = T>

constexpr unsigned int lar::util::details::DataTracker< PWR, T, W >::Power = PWR

static

Definition at line 95 of file StatCollector.h.

template<unsigned int PWR, typename T, typename W = T>

std::array<Weight_t, Power> lar::util::details::DataTracker< PWR, T, W >::sums

protected

Definition at line 130 of file StatCollector.h.

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The documentation for this class was generated from the following file:

• StatCollector.h