我正在研究 chart.js，我有通過 ajax 來自 JSON 的數據。請參見下面的示例：[{"timestamp":"06:00:00.000000","true_count":2},{"timestamp":"07:00:00.000000","true_count":5},{"timestamp":"08:00 :00.000000","true_count":7},{"時間戳":"09:00:00.000000","true_count":8},{"時間戳":"10:00:00.000000","true_count":12} ,{"timestamp":"11:00:00.000000","true_count":15},{"timestamp":"12:00:00.000000","true_count":20},{"timestamp":"13:00 :00.000000","true_count":17},{"時間戳":"14:00:00.000000","true_count":14},{"時間戳":"16:00:00.000000","true_count":11} ,{"時間戳":"17:00:00.000000","true_count":19},{"timestamp":"18:00:00.000000","true_count":22},{"timestamp":"19:00:00.000000","true_count":16},{"timestamp":"20:00: 00.000000","true_count":14},{"時間戳":"22:00:00.000000","true_count":7}]我用于圖表的 JS 代碼如下：    // create initial empty chartvar ctx_live = document.getElementById("chLine");var myChart = new Chart(ctx_live, {  type: 'bar',  data: {    labels: [],    datasets: [{      data: [],      borderWidth: 1,      borderColor:'#00c0ef',      label: 'liveCount',    }]  },  options: {    responsive: true,    title: {      display: true,      text: "Count Per Hour",    },    legend: {      display: false    },    scales: {      yAxes: [{        ticks: {          beginAtZero: true,        }      }]    }  }});// logic to get new datavar getData = function() {   var _data =[];   var _labels = [];  $.ajax({    url: 'chart_data',         type: "get",    success: function(data) {    full_data = JSON.parse(data);    full_data.forEach(function(key,index) {    _data.push(key.true_count);    _labels.push(key.hour); });        myChart.data.labels = _labels;    myChart.data.datasets[0].data = _data;      myChart.update();    }  });};// get new data every 3 secondssetInterval(getData, 3000);現在，這工作正常并顯示了 true_count 隨著時間的推移，這是一個小時的基礎?，F在，該圖表僅顯示帶計數的小時數，但我想做的是將靜態小時數設置為從上午 12 點到晚上 11 點，對于我沒有數據的小時數，true_count 將為零，對于那些我有數據，真實計數將分配給那個小時并顯示在圖表上。關于我該怎么做的任何想法？