আপডেট: দেখে মনে হচ্ছে চার্টজগুলি আপডেট হয়েছে (নীচে মন্তব্য দেখুন)। কিছু উদাহরণ রয়েছে যা দেখতে খুব সুন্দর দেখাচ্ছে:
- নতুন ডেটা ব্যবহার করে লাইন চার্ট আপডেট করার উদাহরণ এখানে রয়েছে: http://jsbin.com/yitep/5/edit
- লাইন চার্টে আমরা কীভাবে বিদ্যমান ডেটা আপডেট করতে পারি তা এখানে: http://jsbin.com/yitep/4/edit
আসল পোস্ট
নভেম্বর 2013 পর্যন্ত, চার্টগুলি আপডেট করার জন্য খুব কম বিকল্প রয়েছে বলে মনে হচ্ছে।
একটি লাইন চার্টে নতুন পয়েন্ট যুক্ত করার এখানে (নীচে সদৃশ) একটি ভাল উদাহরণ রয়েছে । এখনও ধড়ফড়ানি ধরণের তবে খুব খারাপ নয়। তবে আমি মনে করি যে প্রভাবটি সম্ভবত আপনি যে চার্টটি ব্যবহার করছেন তার উপর নির্ভর করে।
দেখে মনে হচ্ছে এটি উন্নয়নের পাইপলাইনে কোথাও রয়েছে। যদিও আমি এখনও প্রকাশের তারিখের কোনও ইঙ্গিত দেখতে পাচ্ছি না: https://github.com/nnnick/Chart.js/issues/13 [জুলাই 26, 2014 অবধি বন্ধ]
জাতীয়
$(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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scaleOverride:!1,scaleSteps:null,scaleStepWidth:null,scaleStartValue:null,scaleShowLine:!0,scaleLineColor:"rgba(0,0,0,.1)",scaleLineWidth:1,scaleShowLabels:!0,scaleLabel:"<%=value%>",scaleFontFamily:"'Arial'",scaleFontSize:12,scaleFontStyle:"normal",scaleFontColor:"#666",scaleShowLabelBackdrop:!0,scaleBackdropColor:"rgba(255,255,255,0.75)",scaleBackdropPaddingY:2,scaleBackdropPaddingX:2,segmentShowStroke:!0,segmentStrokeColor:"#fff",segmentStrokeWidth:2,animation:!0,animationSteps:100,animationEasing:"easeOutBounce",
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এইচটিএমএল
<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
</head>
<body>
<h1>Live Updating Chart.js</h1>
<canvas id="myChart" width="400" height="150"></canvas>
</body>
</html>