updated-packages

vendor/markbaker/matrix/classes/src/Functions/antidiagonal.php

@@ -0,0 +1,31 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix antidiagonal() function
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+/**
+ * Returns the antidiagonal of a matrix or an array.
+ *
+ * @param     Matrix|array     $matrix    Matrix or an array to treat as a matrix.
+ * @return    Matrix           The new matrix
+ * @throws    Exception        If argument isn't a valid matrix or array.
+ */
+if (!function_exists(__NAMESPACE__ . '\\antidiagonal')) {
+    function antidiagonal($matrix): Matrix
+    {
+        if (is_array($matrix)) {
+            $matrix = new Matrix($matrix);
+        }
+        if (!$matrix instanceof Matrix) {
+            throw new Exception('Must be Matrix or array');
+        }
+
+        return Functions::antidiagonal($matrix);
+    }
+}