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jamesalday/doublemadoutliers
============================

Uses the Double Median Absolute Deviation test to find outliers in data

3151PHP

Since Jun 20Pushed 7y agoCompare

[ Source](https://github.com/JamesAlday/DoubleMadOutliers)[ Packagist](https://packagist.org/packages/jamesalday/doublemadoutliers)[ RSS](/packages/jamesalday-doublemadoutliers/feed)WikiDiscussions master Synced today

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Double Median Absolute Deviation Outlier Test
=============================================

[](#double-median-absolute-deviation-outlier-test)

This is a small library class that tests asymmetric data for outliers based on the 'Double MAD' method.

The data is split into 2 'legs' around the median, and each leg is tested for values that are larger than the median absolute deviation for that leg. This prevents high/low outliers in the data from canceling each other out or smaller outliers being hidden in widely varied data.

This library is an adaptation of the algorithm/R script written by Peter Rosenmai on Eureka Statistics. He gives a much more in-depth analysis of the reasoning behind this method, and it well worth a read if you intend to use this class.

###  Health Score

21

—

LowBetter than 19% of packages

Maintenance20

Infrequent updates — may be unmaintained

Popularity10

Limited adoption so far

Community7

Small or concentrated contributor base

Maturity40

Maturing project, gaining track record

 Bus Factor1

Top contributor holds 100% of commits — single point of failure

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.

### Community

Maintainers

![](https://www.gravatar.com/avatar/ac6524c835a247b5cfa05551f1fdbb4aeebd902902b5ff9aebd1d01871cdcbda?d=identicon)[JamesAlday](/maintainers/JamesAlday)

---

Top Contributors

[![JamesAlday](https://avatars.githubusercontent.com/u/1864845?v=4)](https://github.com/JamesAlday "JamesAlday (8 commits)")

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