https://github.com/giberti/array-functions

Functions for computing descriptive statistics about numeric data sets.
https://github.com/giberti/array-functions

descriptive-statistics php7 php8 statistics

Last synced: 25 days ago
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Functions for computing descriptive statistics about numeric data sets.

• Host: GitHub
• URL: https://github.com/giberti/array-functions
• Owner: giberti
• Created: 2018-10-29T13:16:22.000Z (about 6 years ago)
• Default Branch: main
• Last Pushed: 2023-05-21T12:56:00.000Z (over 1 year ago)
• Last Synced: 2024-03-23T19:06:02.068Z (8 months ago)
• Topics: descriptive-statistics, php7, php8, statistics
• Language: PHP
• Homepage:
• Size: 17.6 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Array Functions

Provides additional array functionality, augmenting the built in `array_*` functions for use in common descriptive statistic calculations.

[![Build and Test](https://github.com/giberti/array-functions/actions/workflows/test-php.yml/badge.svg)](https://github.com/giberti/array-functions/actions/workflows/test-php.yml)

## Installing

This library requires PHP 7.1 or newer, including 8.0, 8.1, and 8.2.

```

composer require giberti/array-functions

```

## Usage

#### string array_fingerprint($array)

Creates a fingerprint for the array, useful for caching values.

```php

$values = [1,2,2,3];

$fingerprint = array_fingerprint($values);

echo $fingerprint; // f591c5a8a39f752a2040e2364e775aec

```

#### float[] array_bucket($array, [$buckets = null])

Groups array values into buckets suitable for source data for a histogram. Takes an optional parameter to force the number of buckets the content should be distributed into.

```php

$values = [1,2,2,3,3,3];

$buckets = array_bucket($values);

print_r($buckets);

// Array (

//           [[0.5,1.5)] => 1

//           [[1.5,2.5)] => 2

//           [[2.5,3.5]] => 3

//       )

```

#### float array_mean($array)

Finds the mean (average) value of the elements in an array of numeric values.

```php

$values = [1,2,2,3];

$mean = array_mean($values);

echo $mean; // 2

```

#### float array_range($array)

Finds the difference between the minimum value and the maximum value in the array.

```php

$values = [1,2,3];

$difference = array_range($values);

echo $difference; // 2

```

#### float array_variance($array [, $sample = true])

Finds the variance for a given array. Works with populations as well as samples.

```php

$values = [1,2,2,3];

$variance = array_variance($values);

echo $variance; // 0.66666666666667

$standardDeviation = sqrt($variance);

echo $standardDeviation; // 0.81649658092773

```