C3: Dynamically Charting using external JSON file

Created on 15 Oct 2016 · 3Comments · Source: c3js/c3

I would like to thank you for creating this great open source library.
I want to create dynamic charts using external JSON file in which the chart parsing json data each at a time.
My Current Code:
var chart = c3.generate({ bindto: '#chart', size: { height: 240, width: 480 }, data: { url: 'static/data/trainp.json', mimeType: 'json', keys: { x: 'Series', value: ['Setting1'] }, type: 'line' }, subchart: { show: true } });

Example of the required chart : https://jsfiddle.net/cy2owjva/

Please let me know what change i have to make in https://jsfiddle.net/cy2owjva/ .
Thank You

Source

Saikat-Sinha

Most helpful comment

@AskSaikatSinha Try this
`
$(function () {

$.getJSON('./linejson.json', function (externaldata) {
var chart = c3.generate({
    title: {
        text:'External JSON loading via C3.js'
    },
    bindto: '#chart',
    data: {
       json: externaldata,
        type: 'area-spline',

    }
})

setInterval(function(){
    chart.flow({
        columns:
                [
                    ['data1',Math.round(Math.random()*200)]
                ],
        type:'area-spline'
    })
}, 1500)

});
})
`

and have your external JSON file like so

linejson.json file

{ "data1": [30, 20, 50, 40, 60, 50] }

HawiCaesar on 1 Nov 2016

👍2

All 3 comments

@AskSaikatSinha Try this
`
$(function () {

$.getJSON('./linejson.json', function (externaldata) {
var chart = c3.generate({
    title: {
        text:'External JSON loading via C3.js'
    },
    bindto: '#chart',
    data: {
       json: externaldata,
        type: 'area-spline',

    }
})

setInterval(function(){
    chart.flow({
        columns:
                [
                    ['data1',Math.round(Math.random()*200)]
                ],
        type:'area-spline'
    })
}, 1500)

});
})
`

and have your external JSON file like so

linejson.json file

{ "data1": [30, 20, 50, 40, 60, 50] }

HawiCaesar on 1 Nov 2016

👍2

I'm at the same issue. Trying to animate a chart with a stream of real time data.
tried this:

var xhr = new XMLHttpRequest();
function reload(){
    //each call on this url changes the json
    xhr.open('GET', "http://127.0.0.1:5000/json/", true).send(); 
    chart.flow('http://127.0.0.1:5000/json/');
    chart.flush()
}

setInterval(reload, 500);

Tried flow, generate, load and none of those reload the chart without needing to reload the browser.

Any tips?