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ce_cdm/metrics/src/distribution.cpp
2017-11-28 17:42:16 -08:00

34 lines
730 B
C++

// Copyright 2017 Google Inc. All Rights Reserved.
//
// This file contains the definitions for the Distribution class members.
#include "distribution.h"
#include <float.h>
namespace wvcdm {
namespace metrics {
Distribution::Distribution() :
count_(0LL),
min_(DBL_MAX),
max_(-DBL_MAX),
mean_(0.0),
sum_squared_deviation_(0.0) {
}
void Distribution::Record(double value) {
// Using method of provisional means.
double deviation = value - mean_;
mean_ = mean_ + (deviation / ++count_);
sum_squared_deviation_ =
sum_squared_deviation_ + (deviation * (value - mean_));
min_ = min_ < value ? min_ : value;
max_ = max_ > value ? max_ : value;
}
} // namespace metrics
} // namespace wvcdm