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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);
}
*/