php-ml/src/Phpml/Dataset/CsvDataset.php
2016-04-16 21:41:37 +02:00

44 lines
995 B
PHP

<?php
declare (strict_types = 1);
namespace Phpml\Dataset;
use Phpml\Exception\DatasetException;
class CsvDataset extends ArrayDataset
{
/**
* @var string
*/
protected $filepath;
/**
* @param string $filepath
* @param int $features
* @param bool $headingRow
*
* @throws DatasetException
*/
public function __construct(string $filepath, int $features, bool $headingRow = true)
{
if (!file_exists($filepath)) {
throw DatasetException::missingFile(basename($filepath));
}
if (false === $handle = fopen($filepath, 'r')) {
throw DatasetException::cantOpenFile(basename($filepath));
}
if ($headingRow) {
fgets($handle);
}
while (($data = fgetcsv($handle, 1000, ',')) !== false) {
$this->samples[] = array_slice($data, 0, $features);
$this->labels[] = $data[$features];
}
fclose($handle);
}
}