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| loadtxt | |
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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace SciPhp\NumPhp; |
| 6 | |
| 7 | use SciPhp\NdArray; |
| 8 | use Webmozart\Assert\Assert; |
| 9 | |
| 10 | /** |
| 11 | * File methods |
| 12 | */ |
| 13 | trait FileTrait |
| 14 | { |
| 15 | /** |
| 16 | * Load data from a text file. |
| 17 | * |
| 18 | * @param string $file |
| 19 | * |
| 20 | * @param array $options |
| 21 | * default is |
| 22 | * [ |
| 23 | * 'headers' => false, |
| 24 | * 'delimiter' => ';' |
| 25 | * ] |
| 26 | * |
| 27 | * @link http://sciphp.org/numphp.loadtxt Documentation |
| 28 | * |
| 29 | * @api |
| 30 | */ |
| 31 | final public static function loadtxt(string $file, array $options = []): NdArray |
| 32 | { |
| 33 | Assert::string($file); |
| 34 | Assert::file($file = realpath($file)); |
| 35 | |
| 36 | $m = []; |
| 37 | $options = array_merge( |
| 38 | ['headers' => false, 'delimiter' => ';'], |
| 39 | $options |
| 40 | ); |
| 41 | |
| 42 | $handle = fopen($file, 'r'); |
| 43 | if ($handle !== false) { |
| 44 | $row = 0; |
| 45 | $num = 0; |
| 46 | |
| 47 | while (($data = fgetcsv($handle, 2048, $options['delimiter'])) !== false) { |
| 48 | if ($row === 0) { |
| 49 | $num = count($data); |
| 50 | } |
| 51 | |
| 52 | Assert::eq($num, count($data)); |
| 53 | |
| 54 | if ($options['headers'] && $row === 0) { |
| 55 | // skip headers |
| 56 | $options['headers'] = false; |
| 57 | } else { |
| 58 | $m[] = $data; |
| 59 | } |
| 60 | |
| 61 | $row++; |
| 62 | } |
| 63 | |
| 64 | fclose($handle); |
| 65 | } |
| 66 | |
| 67 | return static::ar($m); |
| 68 | } |
| 69 | } |