Vexo Compare

A collection of functions to compare vectors. Initially ported from mljs/distance.

Installation

composer require vexo/compare

Usage

<?php

declare(strict_types=1);

use Vexo\Compare\Distance;
use Vexo\Compare\Similarity;

$one = [0.21, -0.32, 0.01];
$two = [0.42, -0.11, -0.02];

// Get the euclidean distance between vector one and two
$distance = euclidean($one, $two);

// Get the average of cosine distances between vector one and two
$similarity = Similarity\cosine($one, $two);

Available functions

Distance

• additiveSymmetric(array $a, array $b): float
• avg(array $a, array $b): float
• bhattacharyya(array $a, array $b): float
• canberra(array $a, array $b): float
• chebyshev(array $a, array $b): float
• clark(array $a, array $b): float
• czekanowski(array $a, array $b): float
• dice(array $a, array $b): float
• divergence(array $a, array $b): float
• euclidean(array $a, array $b): float
• fidelity(array $a, array $b): float
• gower(array $a, array $b): float
• harmonicMean(array $a, array $b): float
• hellinger(array $a, array $b): float
• innerProduct(array $a, array $b): float
• intersection(array $a, array $b): float
• jaccard(array $a, array $b): float
• jeffreys(array $a, array $b): float
• jensenDifference(array $a, array $b): float
• jensenShannon(array $a, array $b): float
• kdivergence(array $a, array $b): float
• kulczynski(array $a, array $b): float
• kullbackLeibler(array $a, array $b): float
• kumarJohnson(array $a, array $b): float
• lorentzian(array $a, array $b): float
• manhattan(array $a, array $b): float
• matusita(array $a, array $b): float
• minkowski(array $a, array $b, float $p): float
• motyka(array $a, array $b): float
• neyman(array $a, array $b): float
• pearson(array $a, array $b): float
• probabilisticSymmetric(array $a, array $b): float
• ruzicka(array $a, array $b): float
• soergel(array $a, array $b): float
• sorensen(array $a, array $b): float
• squared(array $a, array $b): float
• squaredChord(array $a, array $b): float
• taneja(array $a, array $b): float
• tanimoto(array $a, array $b, bool $bitvector = false): float
• topsoe(array $a, array $b): float
• waveHedges(array $a, array $b): float

Similarity

• cosine(array $a, array $b): float
• czekanowski(array $a, array $b): float
• dice(array $a, array $b): float
• intersection(array $a, array $b): float
• kulczynski(array $a, array $b): float
• kumarHassebrook(array $a, array $b): float
• motyka(array $a, array $b): float
• pearson(array $a, array $b): float
• squaredChord(array $a, array $b): float
• tanimoto(array $a, array $b, bool $bitvector = false): float