folly::TDigest::Centroid Class Reference

#include <TDigest.h>

Public Member Functions
	Centroid (double mean=0.0, double weight=1.0)
double	mean () const
double	weight () const
double	add (double sum, double weight)
bool	operator< (const Centroid &other) const

Private Attributes
double	mean_
double	weight_

Detailed Description

Definition at line 52 of file TDigest.h.

Constructor & Destructor Documentation

folly::TDigest::Centroid::Centroid ( double  mean = 0.0, double  weight = 1.0  )

inlineexplicit

Definition at line 54 of file TDigest.h.

References weight().

        : mean_(mean), weight_(weight) {
      DCHECK_GT(weight, 0);
    }

Member Function Documentation

double folly::TDigest::Centroid::add ( double  sum, double  weight  )

inline

Definition at line 369 of file TDigest.cpp.

References folly::TDigest::sum().

Referenced by folly::TDigest::merge(), and weight().

                                                     {
  sum += (mean_ * weight_);
  weight_ += weight;
  mean_ = sum / weight_;
  return sum;
}

double folly::TDigest::Centroid::mean ( ) const

inline

Definition at line 59 of file TDigest.h.

References mean_.

Referenced by folly::TDigest::merge(), and operator<().

                               {
      return mean_;
    }

bool folly::TDigest::Centroid::operator< ( const Centroid &  other ) const

inline

Definition at line 72 of file TDigest.h.

References mean().

                                                       {
      return mean() < other.mean();
    }

double folly::TDigest::Centroid::weight ( ) const

inline

Definition at line 63 of file TDigest.h.

References add(), folly::TDigest::sum(), and weight_.

Referenced by Centroid(), and folly::TDigest::merge().

                                 {
      return weight_;
    }

Member Data Documentation

double folly::TDigest::Centroid::mean_

private

Definition at line 77 of file TDigest.h.

Referenced by mean().

double folly::TDigest::Centroid::weight_

private

Definition at line 78 of file TDigest.h.

Referenced by weight().

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

• proxygen/folly/folly/stats/TDigest.h
• proxygen/folly/folly/stats/TDigest.cpp