2017 © Pedro Peláez
 

library doublemadoutliers

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

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jamesalday/doublemadoutliers

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

  • Wednesday, June 20, 2018
  • by JamesAlday
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  • PHP
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The README.md

Double Median Absolute Deviation Outlier Test

This is a small library class that tests asymmetric data for outliers based on the 'Double MAD' method., (*1)

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., (*2)

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., (*3)

https://eurekastatistics.com/using-the-median-absolute-deviation-to-find-outliers/, (*4)

The Versions

20/06 2018

dev-master

9999999-dev http://github.com/JamesAlday/DoubleMadOutliers

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

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MIT

The Requires

  • php ^5.3.3 || ^7.0

 

The Development Requires

by James Alday

math deviation statitics