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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 Exception(JAMAError(ArgumentTypeException));
| }
| }
| return sqrt($s);
| }
| */
|
|
