giberti / array-functions
Helpers for calculating descriptive statistics on arrays.
Requires
- php: ^7.1
Requires (Dev)
- phpunit/phpunit: ^7.4
README
Provides additional array functionality, augmenting the built in array_*
functions for use in common descriptive statistic calculations.
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.
$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.
$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.
$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.
$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.
$values = [1,2,2,3]; $variance = array_variance($values); echo $variance; // 0.66666666666667 $standardDeviation = sqrt($variance); echo $standardDeviation; // 0.81649658092773