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diff --git a/admin/survey/excel/PHPExcel/Shared/trend/trendClass.php b/admin/survey/excel/PHPExcel/Shared/trend/trendClass.php
deleted file mode 100644
index 59d1b1f..0000000
--- a/admin/survey/excel/PHPExcel/Shared/trend/trendClass.php
+++ /dev/null
@@ -1,156 +0,0 @@
-<?php

-/**

- * PHPExcel

- *

- * Copyright (c) 2006 - 2012 PHPExcel

- *

- * This library is free software; you can redistribute it and/or

- * modify it under the terms of the GNU Lesser General Public

- * License as published by the Free Software Foundation; either

- * version 2.1 of the License, or (at your option) any later version.

- *

- * This library is distributed in the hope that it will be useful,

- * but WITHOUT ANY WARRANTY; without even the implied warranty of

- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

- * Lesser General Public License for more details.

- *

- * You should have received a copy of the GNU Lesser General Public

- * License along with this library; if not, write to the Free Software

- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

- *

- * @category   PHPExcel

- * @package    PHPExcel_Shared_Trend

- * @copyright  Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)

- * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL

- * @version    1.7.8, 2012-10-12

- */

-

-

-require_once PHPEXCEL_ROOT . 'PHPExcel/Shared/trend/linearBestFitClass.php';

-require_once PHPEXCEL_ROOT . 'PHPExcel/Shared/trend/logarithmicBestFitClass.php';

-require_once PHPEXCEL_ROOT . 'PHPExcel/Shared/trend/exponentialBestFitClass.php';

-require_once PHPEXCEL_ROOT . 'PHPExcel/Shared/trend/powerBestFitClass.php';

-require_once PHPEXCEL_ROOT . 'PHPExcel/Shared/trend/polynomialBestFitClass.php';

-

-

-/**

- * PHPExcel_trendClass

- *

- * @category   PHPExcel

- * @package    PHPExcel_Shared_Trend

- * @copyright  Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)

- */

-class trendClass

-{

-	const TREND_LINEAR				= 'Linear';

-	const TREND_LOGARITHMIC			= 'Logarithmic';

-	const TREND_EXPONENTIAL			= 'Exponential';

-	const TREND_POWER				= 'Power';

-	const TREND_POLYNOMIAL_2		= 'Polynomial_2';

-	const TREND_POLYNOMIAL_3		= 'Polynomial_3';

-	const TREND_POLYNOMIAL_4		= 'Polynomial_4';

-	const TREND_POLYNOMIAL_5		= 'Polynomial_5';

-	const TREND_POLYNOMIAL_6		= 'Polynomial_6';

-	const TREND_BEST_FIT			= 'Bestfit';

-	const TREND_BEST_FIT_NO_POLY	= 'Bestfit_no_Polynomials';

-

-	/**

-	 * Names of the best-fit trend analysis methods

-	 *

-	 * @var string[]

-	 **/

-	private static $_trendTypes = array( self::TREND_LINEAR,

-										 self::TREND_LOGARITHMIC,

-										 self::TREND_EXPONENTIAL,

-										 self::TREND_POWER

-									   );

-	/**

-	 * Names of the best-fit trend polynomial orders

-	 *

-	 * @var string[]

-	 **/

-	private static $_trendTypePolyOrders = array( self::TREND_POLYNOMIAL_2,

-												  self::TREND_POLYNOMIAL_3,

-												  self::TREND_POLYNOMIAL_4,

-												  self::TREND_POLYNOMIAL_5,

-												  self::TREND_POLYNOMIAL_6

-											    );

-

-	/**

-	 * Cached results for each method when trying to identify which provides the best fit

-	 *

-	 * @var PHPExcel_Best_Fit[]

-	 **/

-	private static $_trendCache = array();

-

-

-	public static function calculate($trendType=self::TREND_BEST_FIT, $yValues, $xValues=array(), $const=True) {

-		//	Calculate number of points in each dataset

-		$nY = count($yValues);

-		$nX = count($xValues);

-

-		//	Define X Values if necessary

-		if ($nX == 0) {

-			$xValues = range(1,$nY);

-			$nX = $nY;

-		} elseif ($nY != $nX) {

-			//	Ensure both arrays of points are the same size

-			trigger_error("trend(): Number of elements in coordinate arrays do not match.", E_USER_ERROR);

-		}

-

-		$key = md5($trendType.$const.serialize($yValues).serialize($xValues));

-		//	Determine which trend method has been requested

-		switch ($trendType) {

-			//	Instantiate and return the class for the requested trend method

-			case self::TREND_LINEAR :

-			case self::TREND_LOGARITHMIC :

-			case self::TREND_EXPONENTIAL :

-			case self::TREND_POWER :

-				if (!isset(self::$_trendCache[$key])) {

-					$className = 'PHPExcel_'.$trendType.'_Best_Fit';

-					self::$_trendCache[$key] = new $className($yValues,$xValues,$const);

-				}

-				return self::$_trendCache[$key];

-				break;

-			case self::TREND_POLYNOMIAL_2	:

-			case self::TREND_POLYNOMIAL_3	:

-			case self::TREND_POLYNOMIAL_4	:

-			case self::TREND_POLYNOMIAL_5	:

-			case self::TREND_POLYNOMIAL_6	:

-				if (!isset(self::$_trendCache[$key])) {

-					$order = substr($trendType,-1);

-					self::$_trendCache[$key] = new PHPExcel_Polynomial_Best_Fit($order,$yValues,$xValues,$const);

-				}

-				return self::$_trendCache[$key];

-				break;

-			case self::TREND_BEST_FIT			:

-			case self::TREND_BEST_FIT_NO_POLY	:

-				//	If the request is to determine the best fit regression, then we test each trend line in turn

-				//	Start by generating an instance of each available trend method

-				foreach(self::$_trendTypes as $trendMethod) {

-					$className = 'PHPExcel_'.$trendMethod.'BestFit';

-					$bestFit[$trendMethod] = new $className($yValues,$xValues,$const);

-					$bestFitValue[$trendMethod] = $bestFit[$trendMethod]->getGoodnessOfFit();

-				}

-				if ($trendType != self::TREND_BEST_FIT_NO_POLY) {

-					foreach(self::$_trendTypePolyOrders as $trendMethod) {

-						$order = substr($trendMethod,-1);

-						$bestFit[$trendMethod] = new PHPExcel_Polynomial_Best_Fit($order,$yValues,$xValues,$const);

-						if ($bestFit[$trendMethod]->getError()) {

-							unset($bestFit[$trendMethod]);

-						} else {

-							$bestFitValue[$trendMethod] = $bestFit[$trendMethod]->getGoodnessOfFit();

-						}

-					}

-				}

-				//	Determine which of our trend lines is the best fit, and then we return the instance of that trend class

-				arsort($bestFitValue);

-				$bestFitType = key($bestFitValue);

-				return $bestFit[$bestFitType];

-				break;

-			default	:

-				return false;

-		}

-	}	//	function calculate()

-

-}	//	class trendClass
\ No newline at end of file