53 lines
1.3 KiB
PHP
53 lines
1.3 KiB
PHP
<?php
|
|
|
|
declare(strict_types=1);
|
|
|
|
namespace Phpml\Dataset;
|
|
|
|
use Phpml\Exception\FileException;
|
|
|
|
class CsvDataset extends ArrayDataset
|
|
{
|
|
/**
|
|
* @var array
|
|
*/
|
|
protected $columnNames = [];
|
|
|
|
/**
|
|
* @throws FileException
|
|
*/
|
|
public function __construct(string $filepath, int $features, bool $headingRow = true, string $delimiter = ',', int $maxLineLength = 0)
|
|
{
|
|
if (!file_exists($filepath)) {
|
|
throw new FileException(sprintf('File "%s" missing.', basename($filepath)));
|
|
}
|
|
|
|
$handle = fopen($filepath, 'rb');
|
|
if ($handle === false) {
|
|
throw new FileException(sprintf('File "%s" can\'t be open.', basename($filepath)));
|
|
}
|
|
|
|
if ($headingRow) {
|
|
$data = fgetcsv($handle, $maxLineLength, $delimiter);
|
|
$this->columnNames = array_slice((array) $data, 0, $features);
|
|
} else {
|
|
$this->columnNames = range(0, $features - 1);
|
|
}
|
|
|
|
$samples = $targets = [];
|
|
while ($data = fgetcsv($handle, $maxLineLength, $delimiter)) {
|
|
$samples[] = array_slice($data, 0, $features);
|
|
$targets[] = $data[$features];
|
|
}
|
|
|
|
fclose($handle);
|
|
|
|
parent::__construct($samples, $targets);
|
|
}
|
|
|
|
public function getColumnNames(): array
|
|
{
|
|
return $this->columnNames;
|
|
}
|
|
}
|