Dynamicznie aktualizuj wartości wykresu chartjs

Utworzyłem podstawowy wykres słupkowy za pomocą chartjs i działa dobrze. Teraz chcę zaktualizować wartości w przedziale czasowym. Mój problem polega na tym, że po utworzeniu wykresu nie wiem jak poprawnie zaktualizować jego wartości ...

Mój kod:

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);

w kodzie testu aktualizuję wartości datasets[0].data- czy to jest właściwy sposób? Problem polega na tym, że za każdym razem, gdy dzwonię chart.Bar(), wartości są resetowane do 0, a następnie animowane do wartości losowej (tak jak odtwarzam wykres). W ten sposób wszystkie animacje są zawsze od 0 do wartości, co wygląda dziwnie. Spodziewałbym się, że jeśli zaktualizuję wartość z 50 na 10, słupek spadnie do 10 z 50 i nie zostanie ustawiony na 0, a następnie animowany na 10.

Nie znalazłem nic w dokumentach na ten temat ... czy robię coś złego czy to jest niemożliwe z tą biblioteką?

Aktualizacja: Wygląda na to, że chartjs został zaktualizowany (patrz komentarz poniżej). Jest kilka przykładów, które wyglądają bardzo ładnie:

1. Oto przykład aktualizacji wykresu liniowego przy użyciu nowych danych: http://jsbin.com/yitep/5/edit
2. Oto, jak możemy zaktualizować istniejące dane na wykresie liniowym: http://jsbin.com/yitep/4/edit

Oryginalny post

Od listopada 2013 r. Wydaje się, że jest bardzo mało opcji aktualizowania wykresów.

Jest tutaj dobry przykład (powielony poniżej) dodawania nowych punktów do wykresu liniowego. Wciąż trochę nerwowo, ale nieźle. Myślę jednak, że efekt prawdopodobnie zależy od używanego wykresu.

Wygląda na to, że jest to gdzieś w fazie rozwoju. Nie widzę jeszcze żadnej daty premiery: https://github.com/nnnick/Chart.js/issues/13 [Zamknięte 26 lipca 2014 r.]

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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