請教各位，我使用google chart 語法，但x軸數值 0不是在起點， 也不是由小至大，比例也不正確，是否需要增加什麼參數嗎 ?

<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
    <script type="text/javascript">
      google.charts.load('current', {'packages':['bar']});
      google.charts.setOnLoadCallback(drawChart);

      function drawChart() {
        var data = google.visualization.arrayToDataTable([
          ['工作中心', '機台異常工時'],
          <?php

				while($row = $result->fetch(PDO::FETCH_ASSOC))
				{
					
					//時間計算
					$ZZNOTIME = round((strtotime(substr($row['end_at'], 0, 17) . "00") - strtotime(substr($row['start_1'], 0, 17) . "00")) / (60), 2);
					//print_r($row);
					//echo "<br>";

					echo "['".$row['arbpl']."','".$ZZNOTIME."',],";
					//echo "<br>";

				}

			?>
        ]);

        var options = {
          chart: {
            title: '工時統計圖',
            subtitle: '每日',
          },
          bars: 'horizontal' // Required for Material Bar Charts.
        };

        var chart = new google.charts.Bar(document.getElementById('barchart_material'));

        chart.draw(data, google.charts.Bar.convertOptions(options));
      }
    </script>

已解決 :
echo "['".$row['arbpl']."','".$ZZNOTIME."',],";
改寫成
echo "['".$row['arbpl']."',$ZZNOTIME],";