Can some one please explain how to mid data to stack bar chart dynamically?. I have date picker and i can get list of array data to bind the chart. stack level can be different it can be 2,3 or more. below is my chart data set initilization. public chartDatasets:Array = [{data:[]}]; When i set the data in ngOnInit method like below it shows below chart this.chartDatasets= [ { data: [0], label: '' }, { data: [0], label: '' }, ]; but i need set data dynamically when the date picker change.