function pData::getCoefficientOfVariation

5.x pData.class.php pData::getCoefficientOfVariation($Serie)

File

inc/pchart/pchart/class/pData.class.php, line 329

Class

pData

Code

function getCoefficientOfVariation($Serie) 
 {
  if (isset($this->Data ["Series"][$Serie])) 
   {
    $Average = $this->getSerieAverage($Serie);
    $StandardDeviation = $this->getStandardDeviation($Serie);

    if ($StandardDeviation != 0) {
      return ($StandardDeviation / $Average);
    }
    else {
      return (NULL);
    }
  }
  else {
    return (NULL);
  }
}