| // Copyright 2019 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <cmath> |
| #include <limits> |
| |
| namespace catapult { |
| |
| class RunningStatistics { |
| public: |
| RunningStatistics() |
| : count_(0), mean_(0.0), |
| max_(std::numeric_limits<double>::min()), |
| min_(std::numeric_limits<double>::max()), |
| sum_(0.0), variance_(0.0), meanlogs_(0.0), meanlogs_valid_(true) {} |
| |
| void Add(double value); |
| |
| int count() const { return count_;} |
| double mean() const { return mean_;} |
| double max() const { return max_;} |
| double min() const { return min_;} |
| double sum() const { return sum_;} |
| double variance() const; |
| double meanlogs() const; |
| bool meanlogs_valid() const { return meanlogs_valid_; } |
| |
| private: |
| int count_; |
| double mean_; |
| double max_; |
| double min_; |
| double sum_; |
| double variance_; |
| double meanlogs_; // Mean of logarithms of samples. |
| bool meanlogs_valid_; |
| }; |
| |
| } // namespace catapult |
