angular cli - ng2-charts Bitcoin live chart -


i'm newbie , i'm trying render live bitcoin chart using ng2-charts library, fetched data somehow did not know how visualize data chart due structure of data this:

"bpi": { "2017-08-11": 3679.6074, "2017-08-12": 3917.6487, "2017-08-13": 4111.1963}

this api: https://api.coindesk.com/v1/bpi/historical/close.json

this model chart want make it: https://www.coindesk.com/price/

here codes:

historical-bpi.service.ts:

import { injectable } '@angular/core'; import { http } '@angular/http'; import 'rxjs/add/operator/map';  @injectable() export class historicalbpiservice {    private jsonbaseurl: string = 'https://api.coindesk.com/v1/bpi/';    constructor(private http:http) { }    getbpidata(url: string){     return this.http.get(this.jsonbaseurl+url)       .map(res => res.json());   } }

market-data.component.ts:

import { component, oninit } '@angular/core'; import { historicalbpiservice } '../../services/historical-bpi.service';  @component({   selector: 'app-market-data',   templateurl: './market-data.component.html',   styleurls: ['./market-data.component.scss'] }) export class marketdatacomponent implements oninit {    private dataurl: string = 'historical/close.json';    constructor(private historicalbpiservice:historicalbpiservice){}    // linechart   public linechartdata:array<any> = [     {data:[]}    ];    public linechartlabels:array<any> = [];   public linechartoptions:any = {     responsive: true   };   public linechartcolors:array<any> = [     { // grey       backgroundcolor: 'rgba(148,159,177,0.2)',       bordercolor: 'rgba(148,159,177,1)',       pointbackgroundcolor: 'rgba(148,159,177,1)',       pointbordercolor: '#fff',       pointhoverbackgroundcolor: '#fff',       pointhoverbordercolor: 'rgba(148,159,177,0.8)'     },     { // dark grey       backgroundcolor: 'rgba(77,83,96,0.2)',       bordercolor: 'rgba(77,83,96,1)',       pointbackgroundcolor: 'rgba(77,83,96,1)',       pointbordercolor: '#fff',       pointhoverbackgroundcolor: '#fff',       pointhoverbordercolor: 'rgba(77,83,96,1)'     },     { // grey       backgroundcolor: 'rgba(148,159,177,0.2)',       bordercolor: 'rgba(148,159,177,1)',       pointbackgroundcolor: 'rgba(148,159,177,1)',       pointbordercolor: '#fff',       pointhoverbackgroundcolor: '#fff',       pointhoverbordercolor: 'rgba(148,159,177,0.8)'     }   ];   public linechartlegend:boolean = false;   public linecharttype:string = 'line';     // events   public chartclicked(e:any):void {     console.log(e);   }    public charthovered(e:any):void {     console.log(e);   }    ngoninit(){     this.historicalbpiservice.getbpidata(this.dataurl)       .subscribe(         res => {           this.linechartdata[0].data.push(res.bpi);           this.linechartlabels.push(res.bpi);           this.linechartdata = [...this.linechartdata];           this.linechartlabels = [...this.linechartlabels];           console.log(this.linechartdata);         }       )   } }

the template:

<div class="container">   <div style="display: block;">     <canvas basechart       [datasets]="linechartdata"       [labels]="linechartlabels"       [options]="linechartoptions"       [colors]="linechartcolors"       [legend]="linechartlegend"       [charttype]="linecharttype"       (charthover)="charthovered($event)"       (chartclick)="chartclicked($event)"></canvas>   </div>   </div>

thank in advance.

edit: got data chart, somehow not visualized still.

this how changed code in component.ts file (the rest same):

ngoninit(){     this.historicalbpiservice.getbpidata(this.dataurl)       .subscribe(         res => {           this.linechartdata.push(object.values(res.bpi));           this.linechartlabels.push(object.keys(res.bpi));           this.linechartdata = [...this.linechartdata];           this.linechartlabels = [...this.linechartlabels];           console.log(this.linechartdata,this.linechartlabels);         }       )   }

this chart got without errors: enter image description here

you should populate data , labels array :

... ngoninit() {   this.historicalbpiservice.getbpidata(this.dataurl)     .subscribe(       res => {         this.linechartdata[0].data.push(...object.values(res.bpi));         this.linechartlabels.push(...object.keys(res.bpi));         //console.log(this.linechartdata,this.linechartlabels);       }     ) } ...

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