if (Double.isNaN(ye)
        		&& intervalDataset.getEndY(series, item) == null) {
            result[6] = getNullYString();
        }
        else {
            if (ydf != null) {
                result[6] = ydf.format(new Date((long) ye));
            }
            else {
            	result[6] = ynf.format(ye);