ThinkPHP/Library/Org/Util/PHPExcel/Shared/trend/trendClass.php

这里只显示每个文件的开头 60 行。登录后可以解锁完整代码。

微信扫码关注公众号，代码整理好后第一时间通知你。

<?php

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
 *
 * Copyright (c) 2006 - 2015 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 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 * @version    ##VERSION##, ##DATE##
 */
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
    );

    /**