726 lines
27 KiB
PHP
726 lines
27 KiB
PHP
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<?php
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/**
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* PHPExcel
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*
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* Copyright (c) 2006 - 2012 PHPExcel
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* @category PHPExcel
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* @package PHPExcel_Calculation
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* @copyright Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
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* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
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* @version 1.7.8, 2012-10-12
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*/
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/** PHPExcel root directory */
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if (!defined('PHPEXCEL_ROOT')) {
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/**
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* @ignore
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*/
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define('PHPEXCEL_ROOT', dirname(__FILE__) . '/../../');
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require(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
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}
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/**
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* PHPExcel_Calculation_Database
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*
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* @category PHPExcel
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* @package PHPExcel_Calculation
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* @copyright Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
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*/
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class PHPExcel_Calculation_Database {
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/**
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* __fieldExtract
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*
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* Extracts the column ID to use for the data field.
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*
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* @access private
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* @param mixed[] $database The range of cells that makes up the list or database.
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* A database is a list of related data in which rows of related
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* information are records, and columns of data are fields. The
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* first row of the list contains labels for each column.
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* @param mixed $field Indicates which column is used in the function. Enter the
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* column label enclosed between double quotation marks, such as
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* "Age" or "Yield," or a number (without quotation marks) that
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* represents the position of the column within the list: 1 for
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* the first column, 2 for the second column, and so on.
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* @return string|NULL
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*
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*/
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private static function __fieldExtract($database,$field) {
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$field = strtoupper(PHPExcel_Calculation_Functions::flattenSingleValue($field));
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$fieldNames = array_map('strtoupper',array_shift($database));
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if (is_numeric($field)) {
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$keys = array_keys($fieldNames);
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return $keys[$field-1];
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}
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$key = array_search($field,$fieldNames);
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return ($key) ? $key : NULL;
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}
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/**
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* __filter
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*
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* Parses the selection criteria, extracts the database rows that match those criteria, and
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* returns that subset of rows.
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*
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* @access private
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* @param mixed[] $database The range of cells that makes up the list or database.
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* A database is a list of related data in which rows of related
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* information are records, and columns of data are fields. The
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* first row of the list contains labels for each column.
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* @param mixed[] $criteria The range of cells that contains the conditions you specify.
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* You can use any range for the criteria argument, as long as it
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* includes at least one column label and at least one cell below
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* the column label in which you specify a condition for the
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* column.
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* @return array of mixed
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*
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*/
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private static function __filter($database,$criteria) {
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$fieldNames = array_shift($database);
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$criteriaNames = array_shift($criteria);
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// Convert the criteria into a set of AND/OR conditions with [:placeholders]
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$testConditions = $testValues = array();
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$testConditionsCount = 0;
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foreach($criteriaNames as $key => $criteriaName) {
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$testCondition = array();
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$testConditionCount = 0;
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foreach($criteria as $row => $criterion) {
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if ($criterion[$key] > '') {
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$testCondition[] = '[:'.$criteriaName.']'.PHPExcel_Calculation_Functions::_ifCondition($criterion[$key]);
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$testConditionCount++;
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}
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}
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if ($testConditionCount > 1) {
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$testConditions[] = 'OR('.implode(',',$testCondition).')';
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$testConditionsCount++;
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} elseif($testConditionCount == 1) {
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$testConditions[] = $testCondition[0];
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$testConditionsCount++;
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}
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}
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if ($testConditionsCount > 1) {
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$testConditionSet = 'AND('.implode(',',$testConditions).')';
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} elseif($testConditionsCount == 1) {
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$testConditionSet = $testConditions[0];
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}
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// Loop through each row of the database
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foreach($database as $dataRow => $dataValues) {
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// Substitute actual values from the database row for our [:placeholders]
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$testConditionList = $testConditionSet;
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foreach($criteriaNames as $key => $criteriaName) {
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$k = array_search($criteriaName,$fieldNames);
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if (isset($dataValues[$k])) {
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$dataValue = $dataValues[$k];
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$dataValue = (is_string($dataValue)) ? PHPExcel_Calculation::_wrapResult(strtoupper($dataValue)) : $dataValue;
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$testConditionList = str_replace('[:'.$criteriaName.']',$dataValue,$testConditionList);
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}
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}
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// evaluate the criteria against the row data
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$result = PHPExcel_Calculation::getInstance()->_calculateFormulaValue('='.$testConditionList);
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// If the row failed to meet the criteria, remove it from the database
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if (!$result) {
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unset($database[$dataRow]);
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}
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}
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return $database;
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}
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/**
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* DAVERAGE
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*
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* Averages the values in a column of a list or database that match conditions you specify.
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*
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* Excel Function:
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* DAVERAGE(database,field,criteria)
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*
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* @access public
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* @category Database Functions
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* @param mixed[] $database The range of cells that makes up the list or database.
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* A database is a list of related data in which rows of related
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* information are records, and columns of data are fields. The
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* first row of the list contains labels for each column.
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* @param string|integer $field Indicates which column is used in the function. Enter the
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* column label enclosed between double quotation marks, such as
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* "Age" or "Yield," or a number (without quotation marks) that
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* represents the position of the column within the list: 1 for
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* the first column, 2 for the second column, and so on.
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* @param mixed[] $criteria The range of cells that contains the conditions you specify.
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* You can use any range for the criteria argument, as long as it
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* includes at least one column label and at least one cell below
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* the column label in which you specify a condition for the
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* column.
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* @return float
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*
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*/
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public static function DAVERAGE($database,$field,$criteria) {
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$field = self::__fieldExtract($database,$field);
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if (is_null($field)) {
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return NULL;
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}
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// reduce the database to a set of rows that match all the criteria
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$database = self::__filter($database,$criteria);
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// extract an array of values for the requested column
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$colData = array();
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foreach($database as $row) {
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$colData[] = $row[$field];
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}
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// Return
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return PHPExcel_Calculation_Statistical::AVERAGE($colData);
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} // function DAVERAGE()
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/**
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* DCOUNT
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*
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* Counts the cells that contain numbers in a column of a list or database that match conditions
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* that you specify.
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*
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* Excel Function:
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* DCOUNT(database,[field],criteria)
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*
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* Excel Function:
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* DAVERAGE(database,field,criteria)
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*
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* @access public
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* @category Database Functions
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* @param mixed[] $database The range of cells that makes up the list or database.
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* A database is a list of related data in which rows of related
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* information are records, and columns of data are fields. The
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* first row of the list contains labels for each column.
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* @param string|integer $field Indicates which column is used in the function. Enter the
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* column label enclosed between double quotation marks, such as
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* "Age" or "Yield," or a number (without quotation marks) that
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* represents the position of the column within the list: 1 for
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* the first column, 2 for the second column, and so on.
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* @param mixed[] $criteria The range of cells that contains the conditions you specify.
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* You can use any range for the criteria argument, as long as it
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* includes at least one column label and at least one cell below
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* the column label in which you specify a condition for the
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* column.
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* @return integer
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*
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* @TODO The field argument is optional. If field is omitted, DCOUNT counts all records in the
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* database that match the criteria.
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*
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*/
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public static function DCOUNT($database,$field,$criteria) {
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$field = self::__fieldExtract($database,$field);
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if (is_null($field)) {
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return NULL;
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}
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// reduce the database to a set of rows that match all the criteria
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$database = self::__filter($database,$criteria);
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// extract an array of values for the requested column
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$colData = array();
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foreach($database as $row) {
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$colData[] = $row[$field];
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}
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// Return
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return PHPExcel_Calculation_Statistical::COUNT($colData);
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} // function DCOUNT()
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/**
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* DCOUNTA
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*
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* Counts the nonblank cells in a column of a list or database that match conditions that you specify.
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*
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* Excel Function:
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* DCOUNTA(database,[field],criteria)
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*
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* @access public
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* @category Database Functions
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* @param mixed[] $database The range of cells that makes up the list or database.
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* A database is a list of related data in which rows of related
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* information are records, and columns of data are fields. The
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* first row of the list contains labels for each column.
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* @param string|integer $field Indicates which column is used in the function. Enter the
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* column label enclosed between double quotation marks, such as
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* "Age" or "Yield," or a number (without quotation marks) that
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* represents the position of the column within the list: 1 for
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* the first column, 2 for the second column, and so on.
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* @param mixed[] $criteria The range of cells that contains the conditions you specify.
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* You can use any range for the criteria argument, as long as it
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* includes at least one column label and at least one cell below
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* the column label in which you specify a condition for the
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* column.
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* @return integer
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*
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* @TODO The field argument is optional. If field is omitted, DCOUNTA counts all records in the
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* database that match the criteria.
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*
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*/
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public static function DCOUNTA($database,$field,$criteria) {
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$field = self::__fieldExtract($database,$field);
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if (is_null($field)) {
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return NULL;
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}
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// reduce the database to a set of rows that match all the criteria
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$database = self::__filter($database,$criteria);
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// extract an array of values for the requested column
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$colData = array();
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foreach($database as $row) {
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$colData[] = $row[$field];
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}
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// Return
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return PHPExcel_Calculation_Statistical::COUNTA($colData);
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} // function DCOUNTA()
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/**
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* DGET
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*
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* Extracts a single value from a column of a list or database that matches conditions that you
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* specify.
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*
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* Excel Function:
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* DGET(database,field,criteria)
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*
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* @access public
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* @category Database Functions
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* @param mixed[] $database The range of cells that makes up the list or database.
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* A database is a list of related data in which rows of related
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* information are records, and columns of data are fields. The
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* first row of the list contains labels for each column.
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* @param string|integer $field Indicates which column is used in the function. Enter the
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* column label enclosed between double quotation marks, such as
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|
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* "Age" or "Yield," or a number (without quotation marks) that
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|
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* represents the position of the column within the list: 1 for
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|
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* the first column, 2 for the second column, and so on.
|
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|
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* @param mixed[] $criteria The range of cells that contains the conditions you specify.
|
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|
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* You can use any range for the criteria argument, as long as it
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* includes at least one column label and at least one cell below
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* the column label in which you specify a condition for the
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* column.
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* @return mixed
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*
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*/
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public static function DGET($database,$field,$criteria) {
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$field = self::__fieldExtract($database,$field);
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if (is_null($field)) {
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return NULL;
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}
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// reduce the database to a set of rows that match all the criteria
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$database = self::__filter($database,$criteria);
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// extract an array of values for the requested column
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$colData = array();
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foreach($database as $row) {
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$colData[] = $row[$field];
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}
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// Return
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if (count($colData) > 1) {
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return PHPExcel_Calculation_Functions::NaN();
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}
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return $colData[0];
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} // function DGET()
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/**
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* DMAX
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*
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* Returns the largest number in a column of a list or database that matches conditions you that
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* specify.
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*
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|
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* Excel Function:
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* DMAX(database,field,criteria)
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*
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* @access public
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* @category Database Functions
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* @param mixed[] $database The range of cells that makes up the list or database.
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||
|
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* A database is a list of related data in which rows of related
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|
|
* information are records, and columns of data are fields. The
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||
|
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* first row of the list contains labels for each column.
|
||
|
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* @param string|integer $field Indicates which column is used in the function. Enter the
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* column label enclosed between double quotation marks, such as
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||
|
|
* "Age" or "Yield," or a number (without quotation marks) that
|
||
|
|
* represents the position of the column within the list: 1 for
|
||
|
|
* the first column, 2 for the second column, and so on.
|
||
|
|
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
|
||
|
|
* You can use any range for the criteria argument, as long as it
|
||
|
|
* includes at least one column label and at least one cell below
|
||
|
|
* the column label in which you specify a condition for the
|
||
|
|
* column.
|
||
|
|
* @return float
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
public static function DMAX($database,$field,$criteria) {
|
||
|
|
$field = self::__fieldExtract($database,$field);
|
||
|
|
if (is_null($field)) {
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
// reduce the database to a set of rows that match all the criteria
|
||
|
|
$database = self::__filter($database,$criteria);
|
||
|
|
// extract an array of values for the requested column
|
||
|
|
$colData = array();
|
||
|
|
foreach($database as $row) {
|
||
|
|
$colData[] = $row[$field];
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return
|
||
|
|
return PHPExcel_Calculation_Statistical::MAX($colData);
|
||
|
|
} // function DMAX()
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* DMIN
|
||
|
|
*
|
||
|
|
* Returns the smallest number in a column of a list or database that matches conditions you that
|
||
|
|
* specify.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* DMIN(database,field,criteria)
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Database Functions
|
||
|
|
* @param mixed[] $database The range of cells that makes up the list or database.
|
||
|
|
* A database is a list of related data in which rows of related
|
||
|
|
* information are records, and columns of data are fields. The
|
||
|
|
* first row of the list contains labels for each column.
|
||
|
|
* @param string|integer $field Indicates which column is used in the function. Enter the
|
||
|
|
* column label enclosed between double quotation marks, such as
|
||
|
|
* "Age" or "Yield," or a number (without quotation marks) that
|
||
|
|
* represents the position of the column within the list: 1 for
|
||
|
|
* the first column, 2 for the second column, and so on.
|
||
|
|
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
|
||
|
|
* You can use any range for the criteria argument, as long as it
|
||
|
|
* includes at least one column label and at least one cell below
|
||
|
|
* the column label in which you specify a condition for the
|
||
|
|
* column.
|
||
|
|
* @return float
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
public static function DMIN($database,$field,$criteria) {
|
||
|
|
$field = self::__fieldExtract($database,$field);
|
||
|
|
if (is_null($field)) {
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
// reduce the database to a set of rows that match all the criteria
|
||
|
|
$database = self::__filter($database,$criteria);
|
||
|
|
// extract an array of values for the requested column
|
||
|
|
$colData = array();
|
||
|
|
foreach($database as $row) {
|
||
|
|
$colData[] = $row[$field];
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return
|
||
|
|
return PHPExcel_Calculation_Statistical::MIN($colData);
|
||
|
|
} // function DMIN()
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* DPRODUCT
|
||
|
|
*
|
||
|
|
* Multiplies the values in a column of a list or database that match conditions that you specify.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* DPRODUCT(database,field,criteria)
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Database Functions
|
||
|
|
* @param mixed[] $database The range of cells that makes up the list or database.
|
||
|
|
* A database is a list of related data in which rows of related
|
||
|
|
* information are records, and columns of data are fields. The
|
||
|
|
* first row of the list contains labels for each column.
|
||
|
|
* @param string|integer $field Indicates which column is used in the function. Enter the
|
||
|
|
* column label enclosed between double quotation marks, such as
|
||
|
|
* "Age" or "Yield," or a number (without quotation marks) that
|
||
|
|
* represents the position of the column within the list: 1 for
|
||
|
|
* the first column, 2 for the second column, and so on.
|
||
|
|
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
|
||
|
|
* You can use any range for the criteria argument, as long as it
|
||
|
|
* includes at least one column label and at least one cell below
|
||
|
|
* the column label in which you specify a condition for the
|
||
|
|
* column.
|
||
|
|
* @return float
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
public static function DPRODUCT($database,$field,$criteria) {
|
||
|
|
$field = self::__fieldExtract($database,$field);
|
||
|
|
if (is_null($field)) {
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
// reduce the database to a set of rows that match all the criteria
|
||
|
|
$database = self::__filter($database,$criteria);
|
||
|
|
// extract an array of values for the requested column
|
||
|
|
$colData = array();
|
||
|
|
foreach($database as $row) {
|
||
|
|
$colData[] = $row[$field];
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return
|
||
|
|
return PHPExcel_Calculation_MathTrig::PRODUCT($colData);
|
||
|
|
} // function DPRODUCT()
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* DSTDEV
|
||
|
|
*
|
||
|
|
* Estimates the standard deviation of a population based on a sample by using the numbers in a
|
||
|
|
* column of a list or database that match conditions that you specify.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* DSTDEV(database,field,criteria)
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Database Functions
|
||
|
|
* @param mixed[] $database The range of cells that makes up the list or database.
|
||
|
|
* A database is a list of related data in which rows of related
|
||
|
|
* information are records, and columns of data are fields. The
|
||
|
|
* first row of the list contains labels for each column.
|
||
|
|
* @param string|integer $field Indicates which column is used in the function. Enter the
|
||
|
|
* column label enclosed between double quotation marks, such as
|
||
|
|
* "Age" or "Yield," or a number (without quotation marks) that
|
||
|
|
* represents the position of the column within the list: 1 for
|
||
|
|
* the first column, 2 for the second column, and so on.
|
||
|
|
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
|
||
|
|
* You can use any range for the criteria argument, as long as it
|
||
|
|
* includes at least one column label and at least one cell below
|
||
|
|
* the column label in which you specify a condition for the
|
||
|
|
* column.
|
||
|
|
* @return float
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
public static function DSTDEV($database,$field,$criteria) {
|
||
|
|
$field = self::__fieldExtract($database,$field);
|
||
|
|
if (is_null($field)) {
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
// reduce the database to a set of rows that match all the criteria
|
||
|
|
$database = self::__filter($database,$criteria);
|
||
|
|
// extract an array of values for the requested column
|
||
|
|
$colData = array();
|
||
|
|
foreach($database as $row) {
|
||
|
|
$colData[] = $row[$field];
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return
|
||
|
|
return PHPExcel_Calculation_Statistical::STDEV($colData);
|
||
|
|
} // function DSTDEV()
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* DSTDEVP
|
||
|
|
*
|
||
|
|
* Calculates the standard deviation of a population based on the entire population by using the
|
||
|
|
* numbers in a column of a list or database that match conditions that you specify.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* DSTDEVP(database,field,criteria)
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Database Functions
|
||
|
|
* @param mixed[] $database The range of cells that makes up the list or database.
|
||
|
|
* A database is a list of related data in which rows of related
|
||
|
|
* information are records, and columns of data are fields. The
|
||
|
|
* first row of the list contains labels for each column.
|
||
|
|
* @param string|integer $field Indicates which column is used in the function. Enter the
|
||
|
|
* column label enclosed between double quotation marks, such as
|
||
|
|
* "Age" or "Yield," or a number (without quotation marks) that
|
||
|
|
* represents the position of the column within the list: 1 for
|
||
|
|
* the first column, 2 for the second column, and so on.
|
||
|
|
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
|
||
|
|
* You can use any range for the criteria argument, as long as it
|
||
|
|
* includes at least one column label and at least one cell below
|
||
|
|
* the column label in which you specify a condition for the
|
||
|
|
* column.
|
||
|
|
* @return float
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
public static function DSTDEVP($database,$field,$criteria) {
|
||
|
|
$field = self::__fieldExtract($database,$field);
|
||
|
|
if (is_null($field)) {
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
// reduce the database to a set of rows that match all the criteria
|
||
|
|
$database = self::__filter($database,$criteria);
|
||
|
|
// extract an array of values for the requested column
|
||
|
|
$colData = array();
|
||
|
|
foreach($database as $row) {
|
||
|
|
$colData[] = $row[$field];
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return
|
||
|
|
return PHPExcel_Calculation_Statistical::STDEVP($colData);
|
||
|
|
} // function DSTDEVP()
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* DSUM
|
||
|
|
*
|
||
|
|
* Adds the numbers in a column of a list or database that match conditions that you specify.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* DSUM(database,field,criteria)
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Database Functions
|
||
|
|
* @param mixed[] $database The range of cells that makes up the list or database.
|
||
|
|
* A database is a list of related data in which rows of related
|
||
|
|
* information are records, and columns of data are fields. The
|
||
|
|
* first row of the list contains labels for each column.
|
||
|
|
* @param string|integer $field Indicates which column is used in the function. Enter the
|
||
|
|
* column label enclosed between double quotation marks, such as
|
||
|
|
* "Age" or "Yield," or a number (without quotation marks) that
|
||
|
|
* represents the position of the column within the list: 1 for
|
||
|
|
* the first column, 2 for the second column, and so on.
|
||
|
|
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
|
||
|
|
* You can use any range for the criteria argument, as long as it
|
||
|
|
* includes at least one column label and at least one cell below
|
||
|
|
* the column label in which you specify a condition for the
|
||
|
|
* column.
|
||
|
|
* @return float
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
public static function DSUM($database,$field,$criteria) {
|
||
|
|
$field = self::__fieldExtract($database,$field);
|
||
|
|
if (is_null($field)) {
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
// reduce the database to a set of rows that match all the criteria
|
||
|
|
$database = self::__filter($database,$criteria);
|
||
|
|
// extract an array of values for the requested column
|
||
|
|
$colData = array();
|
||
|
|
foreach($database as $row) {
|
||
|
|
$colData[] = $row[$field];
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return
|
||
|
|
return PHPExcel_Calculation_MathTrig::SUM($colData);
|
||
|
|
} // function DSUM()
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* DVAR
|
||
|
|
*
|
||
|
|
* Estimates the variance of a population based on a sample by using the numbers in a column
|
||
|
|
* of a list or database that match conditions that you specify.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* DVAR(database,field,criteria)
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Database Functions
|
||
|
|
* @param mixed[] $database The range of cells that makes up the list or database.
|
||
|
|
* A database is a list of related data in which rows of related
|
||
|
|
* information are records, and columns of data are fields. The
|
||
|
|
* first row of the list contains labels for each column.
|
||
|
|
* @param string|integer $field Indicates which column is used in the function. Enter the
|
||
|
|
* column label enclosed between double quotation marks, such as
|
||
|
|
* "Age" or "Yield," or a number (without quotation marks) that
|
||
|
|
* represents the position of the column within the list: 1 for
|
||
|
|
* the first column, 2 for the second column, and so on.
|
||
|
|
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
|
||
|
|
* You can use any range for the criteria argument, as long as it
|
||
|
|
* includes at least one column label and at least one cell below
|
||
|
|
* the column label in which you specify a condition for the
|
||
|
|
* column.
|
||
|
|
* @return float
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
public static function DVAR($database,$field,$criteria) {
|
||
|
|
$field = self::__fieldExtract($database,$field);
|
||
|
|
if (is_null($field)) {
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
// reduce the database to a set of rows that match all the criteria
|
||
|
|
$database = self::__filter($database,$criteria);
|
||
|
|
// extract an array of values for the requested column
|
||
|
|
$colData = array();
|
||
|
|
foreach($database as $row) {
|
||
|
|
$colData[] = $row[$field];
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return
|
||
|
|
return PHPExcel_Calculation_Statistical::VARFunc($colData);
|
||
|
|
} // function DVAR()
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* DVARP
|
||
|
|
*
|
||
|
|
* Calculates the variance of a population based on the entire population by using the numbers
|
||
|
|
* in a column of a list or database that match conditions that you specify.
|
||
|
|
*
|
||
|
|
* Excel Function:
|
||
|
|
* DVARP(database,field,criteria)
|
||
|
|
*
|
||
|
|
* @access public
|
||
|
|
* @category Database Functions
|
||
|
|
* @param mixed[] $database The range of cells that makes up the list or database.
|
||
|
|
* A database is a list of related data in which rows of related
|
||
|
|
* information are records, and columns of data are fields. The
|
||
|
|
* first row of the list contains labels for each column.
|
||
|
|
* @param string|integer $field Indicates which column is used in the function. Enter the
|
||
|
|
* column label enclosed between double quotation marks, such as
|
||
|
|
* "Age" or "Yield," or a number (without quotation marks) that
|
||
|
|
* represents the position of the column within the list: 1 for
|
||
|
|
* the first column, 2 for the second column, and so on.
|
||
|
|
* @param mixed[] $criteria The range of cells that contains the conditions you specify.
|
||
|
|
* You can use any range for the criteria argument, as long as it
|
||
|
|
* includes at least one column label and at least one cell below
|
||
|
|
* the column label in which you specify a condition for the
|
||
|
|
* column.
|
||
|
|
* @return float
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
public static function DVARP($database,$field,$criteria) {
|
||
|
|
$field = self::__fieldExtract($database,$field);
|
||
|
|
if (is_null($field)) {
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
// reduce the database to a set of rows that match all the criteria
|
||
|
|
$database = self::__filter($database,$criteria);
|
||
|
|
// extract an array of values for the requested column
|
||
|
|
$colData = array();
|
||
|
|
foreach($database as $row) {
|
||
|
|
$colData[] = $row[$field];
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return
|
||
|
|
return PHPExcel_Calculation_Statistical::VARP($colData);
|
||
|
|
} // function DVARP()
|
||
|
|
|
||
|
|
|
||
|
|
} // class PHPExcel_Calculation_Database
|