denissimon/prediction-builder

A library for machine learning that builds predictions using a linear regression.

PredictionBuilder

, _(*1)

PredictionBuilder is a library for machine learning that builds predictions using a linear regression., _(*2)

Requirements

This project requires PHP 5.4 or higher because makes use of trait and short array syntax., _(*3)

Installation

You can install the library by Composer. Add this to your project's composer.json:, _(*4)

``` json "require": { "denissimon/prediction-builder": "*" }, <sub>(*5)</sub>

Then run `php composer.phar install` (or `composer install`).

Example
-------

``` php
use PredictionBuilder\PredictionBuilder;

require_once __DIR__ . '/vendor/autoload.php';

$data = [[1,20],[2,70],[2,45],[3,81],[5,73],[6,80],[7,110]];
$x = 4.5;

// What is the expected y value for a given x value?
try {
    $prediction = new PredictionBuilder($x, $data);
    $result = $prediction->build(); // y = 76.65
} catch (\Exception $e) {
    echo $e->getMessage(), "\n";
}

The returned object has the following properties:, <sub>(*6)</sub>

$result->ln_model linear model that fits the data: "29.56362+10.46364x", <sub>(*7)</sub>

$result->cor correlation coefficient: 0.8348, <sub>(*8)</sub>

$result->x given x value: 4.5, <sub>(*9)</sub>

$result->y predicted y value: 76.65, <sub>(*10)</sub>

License

Licensed under the MIT License, <sub>(*11)</sub>