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<?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; } }
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