updated-packages

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

@@ -0,0 +1,46 @@
+<?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> $matrixValues The matrices to add
+ * @return Matrix
+ * @throws Exception
+ */
+if (!function_exists(__NAMESPACE__ . '\\directsum')) {
+    function directsum(...$matrixValues): Matrix
+    {
+        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();
+    }
+}