adding abstract function in Stats class
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@ -219,6 +219,13 @@ abstract class Stats
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return $data;
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}
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/**
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* @param int $year year number
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* @param int $format 0=Label of abscissa is a translated text, 1=Label of abscissa is month number, 2=Label of abscissa is first letter of month
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* @return int value
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*/
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protected abstract function getAverageByMonth($year, $format = 0);
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/**
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* Return average of entity by month for several years
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*
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@ -236,7 +243,7 @@ abstract class Stats
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$year = $startyear;
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while ($year <= $endyear) {
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$datay[$year] = $this->_getAverageByMonth($year);
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$datay[$year] = $this->getAverageByMonth($year);
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$year++;
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}
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