php-ml linear classifier performance comparison (https://github.com/php-ai/php-ml/pull/78)

gistfile1.txt

RESULTS:

➜  php-ml-fork git:(partial-train) ✗ php memory-usage.php
string(18) "perceptron: 522368"
string(15) "adaline: 490576"
string(16) "logistic: 484832"
➜  php-ml-fork git:(cost-values-key) ✗ php memory-usage.php
string(17) "perceptron: 77312"
string(14) "adaline: 45520"
string(15) "logistic: 32864"

SCRIPT:

<?php

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

use Phpml\Dataset\Demo\WineDataset;
use Phpml\Classification\Linear\Perceptron;
use Phpml\Classification\Linear\Adaline;
use Phpml\Classification\Linear\LogisticRegression;

$dataset = new WineDataset();

$classifiers['perceptron'] = new Perceptron();
$classifiers['adaline'] = new Adaline();
$classifiers['logistic'] = new LogisticRegression();

foreach ($classifiers as $name => $classifier) {
    $mem1 = memory_get_usage(false);
    $classifier->train($dataset->getSamples(), $dataset->getTargets());
    $mem2 = memory_get_usage(false);
    var_dump($name . ': ' . ($mem2 - $mem1));
}