NDArrayPHP

<?php

use PhpMlKit\NDArray\NDArray;

// Create arrays
$a = NDArray::array([[1, 2], [3, 4]]);
$b = NDArray::ones([2, 2]);

// Mathematical operations (method calls, NOT operators)
$c = $a->add($b);              // Element-wise addition
$d = $a->matmul($b);          // Matrix multiplication
$e = $a->sum();                // Sum all elements

// Slicing with zero-copy views
$first_row = $a[0];            // View: no data copied!
$sub_matrix = $a->slice(['0:1', '0:1']);

// Linear algebra
$dot = $a->dot($b);
$trace = $a->trace();

// Work with a 1000x1000 matrix subset instantly
$data = NDArray::random([1000, 1000]);  // 8MB array
$batch = $data->slice(['0:32']);       // View: 0 bytes copied!

$batch->set([0, 0], 5);  // Modifies $data!
$mean = $batch->mean();   // Calculate on view