Skip to content
This repository has been archived by the owner on Oct 23, 2021. It is now read-only.
/ measurable Public archive

Various distance and similarity measures for machine learning.

License

Notifications You must be signed in to change notification settings

agarie/measurable

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

Measurable

Build Status Code Climate

A gem to test what metric is best for certain kinds of datasets in machine learning. Besides the Array class, I also want to support NMatrix.

This is a fork of the gem Distance Measure, which has a similar objective, but isn't actively maintained and doesn't support NMatrix. Thank you, @reddavis. :)

Installation

gem install measurable

I test this gem (via Travis CI) on Ruby MRI 2.5, 2.6 and 2.7.

Available distance measures

I'm using the term "distance measure" without much concern for the strict mathematical definition of a metric. If the documentation for one of the methods isn't clear about it being or not a metric, please open an issue.

The following are the similarity measures supported at the moment:

How to use

The API I intend to support is something like this:

require 'measurable'

# Calculate the distance between two points in space.
Measurable.euclidean([1, 1], [0, 0]) # => 1.41421

# Calculate the norm of a vector, i.e. its distance from the origin.
Measurable.euclidean([1, 1]) # => 1.4142135623730951

# Get the cosine distance between
Measurable.cosine_distance([1, 2], [2, 3]) # => 0.007722123286332261

# Calculate sum of squares directly.
Measurable.euclidean_squared([3, 4]) # => 25

Most of the methods accept arbitrary enumerable objects instead of Arrays. For example, it's possible to use NMatrix.

Documentation

The documentation is hosted on rubydoc.

License

See LICENSE for details.

The original distance_measures gem is copyrighted by @reddavis.

About

Various distance and similarity measures for machine learning.

Resources

License

Stars

Watchers

Forks

Packages

No packages published

Languages