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extend/phpexcel/PHPExcel/Shared/JAMA/utils/Maths.php

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+<?php
+/**
+ *	@package JAMA
+ *
+ *	Pythagorean Theorem:
+ *
+ *	a = 3
+ *	b = 4
+ *	r = sqrt(square(a) + square(b))
+ *	r = 5
+ *
+ *	r = sqrt(a^2 + b^2) without under/overflow.
+ */
+function hypo($a, $b) {
+	if (abs($a) > abs($b)) {
+		$r = $b / $a;
+		$r = abs($a) * sqrt(1 + $r * $r);
+	} elseif ($b != 0) {
+		$r = $a / $b;
+		$r = abs($b) * sqrt(1 + $r * $r);
+	} else {
+		$r = 0.0;
+	}
+	return $r;
+}	//	function hypo()
+
+
+/**
+ *	Mike Bommarito's version.
+ *	Compute n-dimensional hyotheneuse.
+ *
+function hypot() {
+	$s = 0;
+	foreach (func_get_args() as $d) {
+		if (is_numeric($d)) {
+			$s += pow($d, 2);
+		} else {
+			throw new PHPExcel_Calculation_Exception(JAMAError(ArgumentTypeException));
+		}
+	}
+	return sqrt($s);
+}
+*/