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diff --git a/admin/survey/excel/PHPExcel/Shared/JAMA/examples/LMQuadTest.php b/admin/survey/excel/PHPExcel/Shared/JAMA/examples/LMQuadTest.php
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+++ b/admin/survey/excel/PHPExcel/Shared/JAMA/examples/LMQuadTest.php
@@ -0,0 +1,116 @@
+<?php
+/**
+ * quadratic (p-o)'S'S(p-o)
+ * solve for o, S
+ * S is a single scale factor
+ */
+class LMQuadTest {
+
+	/**
+	 * @param array[] $x
+	 * @param array[] $a
+	 */
+	function val($x, $a) {
+		if (count($a) != 3) die ("Wrong number of elements in array a");
+		if (count($x) != 2) die ("Wrong number of elements in array x");
+
+		$ox = $a[0];
+		$oy = $a[1];
+		$s  = $a[2];
+
+		$sdx = $s * ($x[0] - $ox);
+		$sdy = $s * ($x[1] - $oy);
+
+		return ($sdx * $sdx) + ($sdy * $sdy);
+   }	//	function val()
+
+
+	/**
+	 * z = (p-o)'S'S(p-o)
+	 * dz/dp = 2S'S(p-o)
+	 *
+	 * z = (s*(px-ox))^2 + (s*(py-oy))^2
+	 * dz/dox = -2(s*(px-ox))*s
+	 * dz/ds = 2*s*[(px-ox)^2 + (py-oy)^2]
+	 *
+	 * z = (s*dx)^2 + (s*dy)^2
+	 * dz/ds = 2(s*dx)*dx + 2(s*dy)*dy
+	 *
+	 * @param array[] $x
+	 * @param array[] $a
+	 * @param int $a_k
+	 * @param array[] $a
+	 */
+	function grad($x, $a, $a_k) {
+		if (count($a) != 3) die ("Wrong number of elements in array a");
+		if (count($x) != 2) die ("Wrong number of elements in array x");
+		if ($a_k < 3) die ("a_k=".$a_k);
+
+		$ox = $a[0];
+		$oy = $a[1];
+		$s  = $a[2];
+
+		$dx = ($x[0] - $ox);
+		$dy = ($x[1] - $oy);
+
+		if ($a_k == 0)
+			return -2.*$s*$s*$dx;
+		elseif ($a_k == 1)
+			return -2.*$s*$s*$dy;
+		else
+			return 2.*$s*($dx*$dx + $dy*$dy);
+	}	//	function grad()
+
+
+	/**
+	 * @return array[] $a
+	 */
+	function initial() {
+		$a[0] = 0.05;
+		$a[1] = 0.1;
+		$a[2] = 1.0;
+
+		return $a;
+	}	//	function initial()
+
+
+	/**
+	 * @return Object[] $a
+	 */
+	function testdata() {
+		$npts = 25;
+
+		$a[0] = 0.;
+		$a[1] = 0.;
+		$a[2] = 0.9;
+
+		$i = 0;
+
+		for ($r = -2; $r <= 2; ++$r) {
+			for ($c = -2; $c <= 2; ++$c) {
+				$x[$i][0] = $c;
+				$x[$i][1] = $r;
+				$y[$i] = $this->val($x[$i], $a);
+				print("Quad ".$c.",".$r." -> ".$y[$i]."<br />");
+				$s[$i] = 1.;
+				++$i;
+			}
+		}
+		print("quad x= ");
+
+		$qx = new Matrix($x);
+		$qx->print(10, 2);
+
+		print("quad y= ");
+		$qy = new Matrix($y, $npts);
+		$qy->print(10, 2);
+
+		$o[0] = $x;
+		$o[1] = $a;
+		$o[2] = $y;
+		$o[3] = $s;
+
+		return $o;
+	}	//	function testdata()
+
+}	//	class LMQuadTest