https://github.com/hswick/one-hot-encoder

Tiny one hot encoding library for the Clojure community
https://github.com/hswick/one-hot-encoder

Last synced: 6 days ago
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Tiny one hot encoding library for the Clojure community

• Host: GitHub
• URL: https://github.com/hswick/one-hot-encoder
• Owner: hswick
• License: epl-1.0
• Created: 2016-12-20T08:11:40.000Z (almost 8 years ago)
• Default Branch: master
• Last Pushed: 2016-12-24T19:11:35.000Z (almost 8 years ago)
• Last Synced: 2024-06-15T08:22:44.216Z (5 months ago)
• Language: Clojure
• Size: 7.81 KB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

        
# one-hot-encoder

A tiny Clojure library designed to perform feature extraction on categorical data using one hot encoding.

https://en.wikipedia.org/wiki/One-hot

## Installation

To install with Leiningen:

```clojure

[hswick/one-hot-encoder "0.1.0"]

```

## Usage

```clojure

(ns foo.clojure

  (:require [one-hot-encoder.core :refer :all]))

(def test-data [["Sample" "Category" "Numerical"]

                [1 "Human" 1]

                [2 "Human" 1]

                [3 "Penguin" 2]

                [4 "Octopus" 3]

                [5 "Alien" 4]

                [6 "Octopus" 3]

                [7 "Alien" 4]])

(def cols (distinct (map #(nth % 1) (rest test-data))))

(encode cols "Human");;=> [1 0 0 0]

(encode cols "Human" "Penguin");;=> [1 1 0 0]

(encode-coll cols ["Human" "Penguin"]);;=> [1 1 0 0]

(encode-table cols [["Human" "Penguin"]

                    ["Human" "Penguin"]

                    ["Human" "Penguin"]

                    ["Human" "Penguin"]

                    ["Human" "Penguin"]])

;;=> ([1 1 0 0] [1 1 0 0] [1 1 0 0] [1 1 0 0] [1 1 0 0])		    

(def enc (encode ["Human" "Bro" "Foo"] "Human"))

(decode ["Human" "Bro" "Foo"] enc);;=> ("Human")

```

Implementation taken from top answer [here](https://www.quora.com/What-is-one-hot-encoding-and-when-is-it-used-in-data-science)

## License

Copyright © 2016 FIXME

Distributed under the Eclipse Public License either version 1.0 or (at

your option) any later version.