55 lines
1.3 KiB
PHP
55 lines
1.3 KiB
PHP
<?php
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declare(strict_types=1);
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namespace Phpml\Dataset;
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use Phpml\Exception\FileException;
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class CsvDataset extends ArrayDataset
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{
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/**
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* @var array
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*/
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protected $columnNames;
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/**
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* @param string $filepath
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* @param int $features
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* @param bool $headingRow
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*
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* @throws FileException
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*/
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public function __construct(string $filepath, int $features, bool $headingRow = true, string $delimiter = ',')
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{
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if (!file_exists($filepath)) {
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throw FileException::missingFile(basename($filepath));
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}
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if (false === $handle = fopen($filepath, 'rb')) {
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throw FileException::cantOpenFile(basename($filepath));
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}
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if ($headingRow) {
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$data = fgetcsv($handle, 1000, $delimiter);
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$this->columnNames = array_slice($data, 0, $features);
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} else {
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$this->columnNames = range(0, $features - 1);
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}
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while (($data = fgetcsv($handle, 1000, $delimiter)) !== false) {
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$this->samples[] = array_slice($data, 0, $features);
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$this->targets[] = $data[$features];
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}
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fclose($handle);
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}
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/**
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* @return array
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*/
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public function getColumnNames()
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{
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return $this->columnNames;
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}
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}
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