chartjsチャートの値を動的に更新する

chartjsを使用して基本的な棒グラフを作成しましたが、正常に動作します。次に、時間ベースの間隔で値を更新します。私の問題は、グラフを作成した後、その値を正しく更新する方法がわからないことです...

私のコード：

var ctx = $("#myChart").get(0).getContext("2d");

var dts = [
    {
        fillColor: "rgba(220,220,220,0.5)",
        strokeColor: "rgba(220,220,220,1)",
        data: [0, 0, 0, 0, 0]
    }
];

var data = {
    labels: ["Core#1", "Core#2", "Core#3", "Core#4", "Total"],
    datasets: dts
};

var chart = new Chart(ctx);
chart.Bar(data);

//test code
setInterval( function () {                        
    data.datasets[0].data = [random(), random(), random(), random(), random()];
    chart.Bar(data);

},2000);

テストコードで、値を更新していますdatasets[0].data-これは正しい方法ですか？これの問題は、を呼び出すたびにchart.Bar()値が0にリセットされ、ランダムな値にアニメーション化されることです（チャートを再作成しているように）。このように、すべてのアニメーションは常に0から奇妙に見える値までです。値を50から10に更新すると、バーが50から10に下がり、0に設定されずに10にアニメーション化されると思います。

私はこれについてのドキュメントで何も見つかりませんでした...私は何か間違ったことをしていますか、これはこのライブラリでは不可能ですか？

更新： chartjsが更新されたようです（以下のコメントを参照）。とても見栄えの良い例がいくつかあります：

1. 新しいデータを使用して折れ線グラフを更新する例を次に示します。http：//jsbin.com/yitep/5/edit
2. 折れ線グラフの既存のデータを更新する方法は次のとおりです：http : //jsbin.com/yitep/4/edit

元の投稿

2013年11月の時点では、グラフを更新するためのオプションはほとんどないようです。

折れ線グラフに新しいポイントを追加する良い例があります（以下に複製）。まだびくびくしていますが、悪くはありません。ただし、効果はおそらく使用しているチャートに依存すると思います。

これは開発パイプラインのどこかにあるように見えます。ただし、リリース日はまだ表示されていません。https：//github.com/nnnick/Chart.js/issues/13 [2014年7月26日に終了]

JS

$(document).ready(function(){
  var count = 10;
  var data = {
      labels : ["1","2","3","4","5", "6", "7", "8", "9", "10"],
        datasets : [
          {
                fillColor : "rgba(220,220,220,0.5)",
                strokeColor : "rgba(220,220,220,1)",
                pointColor : "rgba(220,220,220,1)",
                pointStrokeColor : "#fff",
                data : [65,59,90,81,56,45,30,20,3,37]
            },
            {
                fillColor : "rgba(151,187,205,0.5)",
                strokeColor : "rgba(151,187,205,1)",
                pointColor : "rgba(151,187,205,1)",
                pointStrokeColor : "#fff",
                data : [28,48,40,19,96,87,66,97,92,85]
            }
        ]
  }
  // this is ugly, don't judge me
  var updateData = function(oldData){
    var labels = oldData["labels"];
    var dataSetA = oldData["datasets"][0]["data"];
    var dataSetB = oldData["datasets"][1]["data"];

    labels.shift();
    count++;
    labels.push(count.toString());
    var newDataA = dataSetA[9] + (20 - Math.floor(Math.random() * (41)));
    var newDataB = dataSetB[9] + (20 - Math.floor(Math.random() * (41)));
    dataSetA.push(newDataA);
    dataSetB.push(newDataB);
    dataSetA.shift();
    dataSetB.shift();    };

  var optionsAnimation = {
    //Boolean - If we want to override with a hard coded scale
    scaleOverride : true,
    //** Required if scaleOverride is true **
    //Number - The number of steps in a hard coded scale
    scaleSteps : 10,
    //Number - The value jump in the hard coded scale
    scaleStepWidth : 10,
    //Number - The scale starting value
    scaleStartValue : 0
  }

  // Not sure why the scaleOverride isn't working...
  var optionsNoAnimation = {
    animation : false,
    //Boolean - If we want to override with a hard coded scale
    scaleOverride : true,
    //** Required if scaleOverride is true **
    //Number - The number of steps in a hard coded scale
    scaleSteps : 20,
    //Number - The value jump in the hard coded scale
    scaleStepWidth : 10,
    //Number - The scale starting value
    scaleStartValue : 0
  }

  //Get the context of the canvas element we want to select
  var ctx = document.getElementById("myChart").getContext("2d");
  var optionsNoAnimation = {animation : false}
  var myNewChart = new Chart(ctx);
  myNewChart.Line(data, optionsAnimation);  

  setInterval(function(){
    updateData(data);
    myNewChart.Line(data, optionsNoAnimation)
    ;}, 2000
  );
});


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