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[Utility & Helpers](/categories/utility) 4. / 5. wikimedia/running-stat ActiveLibrary[Utility & Helpers](/categories/utility) wikimedia/running-stat ====================== PHP implementations of online statistical algorithms v2.2.0(9mo ago)11859.6k↑29.9%21GPL-2.0-or-laterPHPPHP >=8.1.0 Since Oct 27Pushed 1w ago14 watchersCompare [ Source](https://github.com/wikimedia/RunningStat)[ Packagist](https://packagist.org/packages/wikimedia/running-stat)[ Docs](https://www.mediawiki.org/wiki/RunningStat)[ RSS](/packages/wikimedia-running-stat/feed)WikiDiscussions master Synced 2w ago READMEChangelogDependencies (8)Versions (8)Used By (1) RunningStat =========== [](#runningstat) RunningStat computes the central tendency, shape, and extrema of a set of points online, in constant space. It uses a neat one-pass algorithm for calculating variance, described here: [https://en.wikipedia.org/wiki/Algorithms\_for\_calculating\_variance#On-line\_algorithm](https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#On-line_algorithm) This particular implementation adapts a sample C++ implementation by John D. Cook to PHP. See also: - [http://www.johndcook.com/standard\_deviation.html](http://www.johndcook.com/standard_deviation.html) - [http://www.johndcook.com/skewness\_kurtosis.html](http://www.johndcook.com/skewness_kurtosis.html) RunningStat instances can be combined. The resultant RunningStat has the same state it would have had if it had been used to accumulate each point. This property is attractive because it allows separate threads of execution to process a stream in parallel. More importantly, individual points can be accumulated in stages, without loss of fidelity, at intermediate points in the aggregation process. JavaScript profiling samples can be accumulated in the user's browser and be combined with measurements from other browsers on the profiling data aggregator. Functions that are called multiple times in the course of a profiled web request can be accumulated in MediaWiki prior to being transmitted to the profiling data aggregator. Usage ----- [](#usage) Here is how you use it: ``` use Wikimedia\RunningStat; $rstat = new RunningStat(); foreach ( [ 49.7168, 74.3804, 7.0115, 96.5769, 34.9458, 36.9947, 33.8926, 89.0774, 23.7745, 73.5154, 86.1322, 53.2124, 16.2046, 73.5130, 10.4209, 42.7299, 49.3330, 47.0215, 34.9950, 18.2914, ] as $sample ) { $rstat->addObservation( $sample ); } printf( "n = %d; min = %.2f; max = %.2f; mean = %.2f; variance = %.2f; stddev = %.2f\n", count( $rstat ), $rstat->min, $rstat->max, $rstat->getMean(), $rstat->getVariance(), $rstat->getStdDev() ); // Output: // n = 20; min = 7.01; max = 96.58; mean = 47.59; variance = 725.71; stddev = 26.94 ``` License ------- [](#license) GPL-2.0-or-later ### Health Score 61 — FairBetter than 99% of packages Maintenance80 Actively maintained with recent releases Popularity45 Moderate usage in the ecosystem Community26 Small or concentrated contributor base Maturity77 Established project with proven stability Bus Factor3 3 contributors hold 50%+ of commits How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window. **Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores. **Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement. **Maturity (30%)** — Project age, version count, PHP version support, and release stability. ### Release Activity Cadence Every ~610 days Recently: every ~716 days Total 7 Last Release 286d ago Major Versions v1.2.1 → v2.0.02022-05-20 PHP version history (4 changes)v1.0.0PHP >=5.3.3 v1.2.0PHP >=5.5.9 v2.0.0PHP >=7.2.0 v2.2.0PHP >=8.1.0 ### Community Maintainers ![](https://www.gravatar.com/avatar/b94d9718c06ec7c3fd7a104bc44966fb7464b9ec7411582343ea35a7a6a85f08?d=identicon)[mediawiki](/maintainers/mediawiki) ![](https://www.gravatar.com/avatar/716c86d71cbf921e7912a505f89d799de398fc0a3af0bd4c8862834b2d642bd7?d=identicon)[wikimedia](/maintainers/wikimedia) --- Top Contributors [![reedy](https://avatars.githubusercontent.com/u/67615?v=4)](https://github.com/reedy "reedy (13 commits)")[![jdforrester](https://avatars.githubusercontent.com/u/881572?v=4)](https://github.com/jdforrester "jdforrester (11 commits)")[![umherirrender](https://avatars.githubusercontent.com/u/1174884?v=4)](https://github.com/umherirrender "umherirrender (11 commits)")[![Krinkle](https://avatars.githubusercontent.com/u/156867?v=4)](https://github.com/Krinkle "Krinkle (6 commits)")[![legoktm](https://avatars.githubusercontent.com/u/81392?v=4)](https://github.com/legoktm "legoktm (6 commits)")[![atdt](https://avatars.githubusercontent.com/u/376462?v=4)](https://github.com/atdt "atdt (5 commits)")[![ricordisamoa](https://avatars.githubusercontent.com/u/4588496?v=4)](https://github.com/ricordisamoa "ricordisamoa (2 commits)")[![DannyS712](https://avatars.githubusercontent.com/u/46829944?v=4)](https://github.com/DannyS712 "DannyS712 (1 commits)")[![Ammarpad](https://avatars.githubusercontent.com/u/45658045?v=4)](https://github.com/Ammarpad "Ammarpad (1 commits)") ### Code Quality TestsPHPUnit ### Embed Badge ![Health badge](/badges/wikimedia-running-stat/health.svg) ``` [![Health](https://phpackages.com/badges/wikimedia-running-stat/health.svg)](https://phpackages.com/packages/wikimedia-running-stat) ``` ### Alternatives [usamamuneerchaudhary/commentify Easy Laravel Livewire Comments with TailwindCSS UI 23216.2k](/packages/usamamuneerchaudhary-commentify) PHPackages © 2026 [Directory](/)[Categories](/categories)[Trending](/trending)[Changelog](/changelog)[Analyze](/analyze)