public static function PHPExcel_Calculation_Statistical::DEVSQ in Loft Data Grids 6.2

Same name and namespace in other branches

1. 7.2 vendor/phpoffice/phpexcel/Classes/PHPExcel/Calculation/Statistical.php \PHPExcel_Calculation_Statistical::DEVSQ()

* DEVSQ * * Returns the sum of squares of deviations of data points from their sample mean. * * Excel Function: * DEVSQ(value1[,value2[, ...]]) * * @access public * @category Statistical Functions *

Parameters

mixed $arg,... Data values: * @return float

File

vendor/phpoffice/phpexcel/Classes/PHPExcel/Calculation/Statistical.php, line 1434

Class

PHPExcel_Calculation_Statistical

PHPExcel_Calculation_Statistical

Code

public static function DEVSQ() {
  $aArgs = PHPExcel_Calculation_Functions::flattenArrayIndexed(func_get_args());

  // Return value
  $returnValue = null;
  $aMean = self::AVERAGE($aArgs);
  if ($aMean != PHPExcel_Calculation_Functions::DIV0()) {
    $aCount = -1;
    foreach ($aArgs as $k => $arg) {

      // Is it a numeric value?
      if (is_bool($arg) && (!PHPExcel_Calculation_Functions::isCellValue($k) || PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_OPENOFFICE)) {
        $arg = (int) $arg;
      }
      if (is_numeric($arg) && !is_string($arg)) {
        if (is_null($returnValue)) {
          $returnValue = pow($arg - $aMean, 2);
        }
        else {
          $returnValue += pow($arg - $aMean, 2);
        }
        ++$aCount;
      }
    }

    // Return
    if (is_null($returnValue)) {
      return PHPExcel_Calculation_Functions::NaN();
    }
    else {
      return $returnValue;
    }
  }
  return self::NA();
}