flow php

Documentation

Example: Average

Topic: Aggregations

View external resource Download
composer.json 
{
    "name": "flow-php/examples",
    "description": "Flow PHP - Examples",
    "license": "MIT",
    "type": "library",
    "require": {
        "flow-php/etl": "1.x-dev"
    }
}
code.php
<?php

declare(strict_types=1);

use function Flow\ETL\DSL\{average, data_frame, from_rows, int_entry, ref, row, rows, to_stream};

require __DIR__ . '/vendor/autoload.php';

data_frame()
    ->from(from_rows(rows(
        row(int_entry('a', 100)),
        row(int_entry('a', 100)),
        row(int_entry('a', 200)),
        row(int_entry('a', 400)),
        row(int_entry('a', 400))
    )))
    ->aggregate(average(ref('a')))
    ->write(to_stream(__DIR__ . '/output.txt', truncate: false))
    ->run();

Output

+-------+
| a_avg |
+-------+
|   240 |
+-------+
1 rows

Examples

Contributors

Join us on GitHub external resource
norberttech stloyd tomaszhanc DawidSajdak owsiakl f-lapinski Bellangelo jmortlock mleczakm flavioheleno mzarnecki szepeviktor xaviermarchegay scyzoryck christianc1 alexislefebvre peter279k Wirone jpiatko jguittard voku paul-court drupol Wiktor6
scroll back to top