$xReferences[$criteria][$xVal] = (double) CRM_Utils_Array::value($criteria, $yVal, 0);
$yValues[] = (double) CRM_Utils_Array::value($criteria, $yVal, 0);
}
$xReferences[$criteria][$xVal] = (double) CRM_Utils_Array::value($criteria, $yVal, 0);
$yValues[] = (double) CRM_Utils_Array::value($criteria, $yVal, 0);
}