diff options
Diffstat (limited to 'admin/survey/excel/PHPExcel/Shared/JAMA/utils/Maths.php')
| -rw-r--r-- | admin/survey/excel/PHPExcel/Shared/JAMA/utils/Maths.php | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/admin/survey/excel/PHPExcel/Shared/JAMA/utils/Maths.php b/admin/survey/excel/PHPExcel/Shared/JAMA/utils/Maths.php new file mode 100644 index 0000000..5488e00 --- /dev/null +++ b/admin/survey/excel/PHPExcel/Shared/JAMA/utils/Maths.php @@ -0,0 +1,43 @@ +<?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);
+}
+*/
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