Initial commit: apps.prometeysev.ru

vendor/markbaker/matrix/classes/src/operations/directsum.php

@@ -0,0 +1,44 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix direct sum operation
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+
+namespace Matrix;
+
+use Matrix\Operators\DirectSum;
+
+/**
+ * Adds two or more matrices
+ *
+ * @param array<int, mixed> $matrixValues The matrices to add
+ * @return Matrix
+ * @throws Exception
+ */
+function directsum(...$matrixValues)
+{
+    if (count($matrixValues) < 2) {
+        throw new Exception('DirectSum operation requires at least 2 arguments');
+    }
+
+    $matrix = array_shift($matrixValues);
+
+    if (is_array($matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+    if (!$matrix instanceof Matrix) {
+        throw new Exception('DirectSum arguments must be Matrix or array');
+    }
+
+    $result = new DirectSum($matrix);
+
+    foreach ($matrixValues as $matrix) {
+        $result->execute($matrix);
+    }
+
+    return $result->result();
+}