javascript - Amcharts refresh or validate data every seconds

I'm using amcharts4 for my data visualization,and I need to validate my data every seconds, my problem here is that it keeps refreshing the whole chart not the data. I used amcharts3 and I tried this method but there is no problem. Is there any way to refresh and validate the data and not the whole chart?

setInterval(function() {
  refresh();
}, 1000);

function refresh(){
// Themes begin
am4core.useTheme(am4themes_animated);
// Themes end

// Create chart instance
var chart = am4core.create("chartdiv", am4charts.XYChart);

// Add data
chart.data = [ {
  "date": "2012-07-27",
  "value": 13
}, {
  "date": "2012-07-28",
  "value": 11
}, {
  "date": "2012-07-29",
  "value": 15
}, {
  "date": "2012-07-30",
  "value": 16
}, {
  "date": "2012-07-31",
  "value": 18
}, {
  "date": "2012-08-01",
  "value": 13
}, {
  "date": "2012-08-02",
  "value": 22
}, {
  "date": "2012-08-03",
  "value": 23
}, {
  "date": "2012-08-04",
  "value": 20
}, {
  "date": "2012-08-05",
  "value": 17
}, {
  "date": "2012-08-06",
  "value": 16
}, {
  "date": "2012-08-07",
  "value": 18
}, {
  "date": "2012-08-08",
  "value": 21
}, {
  "date": "2012-08-09",
  "value": 26
}, {
  "date": "2012-08-10",
  "value": 24
}, {
  "date": "2012-08-11",
  "value": 29
}, {
  "date": "2012-08-12",
  "value": 32
}, {
  "date": "2012-08-13",
  "value": 18
}, {
  "date": "2012-08-14",
  "value": 24
}, {
  "date": "2012-08-15",
  "value": 22
}, {
  "date": "2012-08-16",
  "value": 18
}, {
  "date": "2012-08-17",
  "value": 19
}, {
  "date": "2012-08-18",
  "value": 14
}, {
  "date": "2012-08-19",
  "value": 15
}, {
  "date": "2012-08-20",
  "value": 12
}, {
  "date": "2012-08-21",
  "value": 8
}, {
  "date": "2012-08-22",
  "value": 9
}, {
  "date": "2012-08-23",
  "value": 8
}, {
  "date": "2012-08-24",
  "value": 7
}, {
  "date": "2012-08-25",
  "value": 5
}, {
  "date": "2012-08-26",
  "value": 11
}, {
  "date": "2012-08-27",
  "value": 13
}, {
  "date": "2012-08-28",
  "value": 18
}, {
  "date": "2012-08-29",
  "value": 20
}, {
  "date": "2012-08-30",
  "value": 29
}, {
  "date": "2012-08-31",
  "value": 33
}, {
  "date": "2012-09-01",
  "value": 42
}, {
  "date": "2012-09-02",
  "value": 35
}, {
  "date": "2012-09-03",
  "value": 31
}, {
  "date": "2012-09-04",
  "value": 47
}, {
  "date": "2012-09-05",
  "value": 52
}, {
  "date": "2012-09-06",
  "value": 46
}, {
  "date": "2012-09-07",
  "value": 41
}, {
  "date": "2012-09-08",
  "value": 43
}, {
  "date": "2012-09-09",
  "value": 40
}, {
  "date": "2012-09-10",
  "value": 39
}, {
  "date": "2012-09-11",
  "value": 34
}, {
  "date": "2012-09-12",
  "value": 29
}, {
  "date": "2012-09-13",
  "value": 34
}, {
  "date": "2012-09-14",
  "value": 37
}, {
  "date": "2012-09-15",
  "value": 42
}, {
  "date": "2012-09-16",
  "value": 49
}, {
  "date": "2012-09-17",
  "value": 46
}, {
  "date": "2012-09-18",
  "value": 47
}, {
  "date": "2012-09-19",
  "value": 55
}, {
  "date": "2012-09-20",
  "value": 59
}, {
  "date": "2012-09-21",
  "value": 58
}, {
  "date": "2012-09-22",
  "value": 57
}, {
  "date": "2012-09-23",
  "value": 61
}, {
  "date": "2012-09-24",
  "value": 59
}, {
  "date": "2012-09-25",
  "value": 67
}, {
  "date": "2012-09-26",
  "value": 65
}, {
  "date": "2012-09-27",
  "value": 61
}, {
  "date": "2012-09-28",
  "value": 66
}, {
  "date": "2012-09-29",
  "value": 69
}, {
  "date": "2012-09-30",
  "value": 71
}, {
  "date": "2012-10-01",
  "value": 67
}, {
  "date": "2012-10-02",
  "value": 63
}, {
  "date": "2012-10-03",
  "value": 46
}, {
  "date": "2012-10-04",
  "value": 32
}, {
  "date": "2012-10-05",
  "value": 21
}, {
  "date": "2012-10-06",
  "value": 18
}, {
  "date": "2012-10-07",
  "value": 21
}, {
  "date": "2012-10-08",
  "value": 28
}, {
  "date": "2012-10-09",
  "value": 27
}, {
  "date": "2012-10-10",
  "value": 36
}, {
  "date": "2012-10-11",
  "value": 33
}, {
  "date": "2012-10-12",
  "value": 31
}, {
  "date": "2012-10-13",
  "value": 30
}, {
  "date": "2012-10-14",
  "value": 34
}, {
  "date": "2012-10-15",
  "value": 38
}, {
  "date": "2012-10-16",
  "value": 37
}, {
  "date": "2012-10-17",
  "value": 44
}, {
  "date": "2012-10-18",
  "value": 49
}, {
  "date": "2012-10-19",
  "value": 53
}, {
  "date": "2012-10-20",
  "value": 57
}, {
  "date": "2012-10-21",
  "value": 60
}, {
  "date": "2012-10-22",
  "value": 61
}, {
  "date": "2012-10-23",
  "value": 69
}, {
  "date": "2012-10-24",
  "value": 67
}, {
  "date": "2012-10-25",
  "value": 72
}, {
  "date": "2012-10-26",
  "value": 77
}, {
  "date": "2012-10-27",
  "value": 75
}, {
  "date": "2012-10-28",
  "value": 70
}, {
  "date": "2012-10-29",
  "value": 72
}, {
  "date": "2012-10-30",
  "value": 70
}, {
  "date": "2012-10-31",
  "value": 72
}, {
  "date": "2012-11-01",
  "value": 73
}, {
  "date": "2012-11-02",
  "value": 67
}, {
  "date": "2012-11-03",
  "value": 68
}, {
  "date": "2012-11-04",
  "value": 65
}, {
  "date": "2012-11-05",
  "value": 71
}, {
  "date": "2012-11-06",
  "value": 75
}, {
  "date": "2012-11-07",
  "value": 74
}, {
  "date": "2012-11-08",
  "value": 71
}, {
  "date": "2012-11-09",
  "value": 76
}, {
  "date": "2012-11-10",
  "value": 77
}, {
  "date": "2012-11-11",
  "value": 81
}, {
  "date": "2012-11-12",
  "value": 83
}, {
  "date": "2012-11-13",
  "value": 80
}, {
  "date": "2012-11-14",
  "value": 81
}, {
  "date": "2012-11-15",
  "value": 87
}, {
  "date": "2012-11-16",
  "value": 82
}, {
  "date": "2012-11-17",
  "value": 86
}, {
  "date": "2012-11-18",
  "value": 80
}, {
  "date": "2012-11-19",
  "value": 87
}, {
  "date": "2012-11-20",
  "value": 83
}, {
  "date": "2012-11-21",
  "value": 85
}, {
  "date": "2012-11-22",
  "value": 84
}, {
  "date": "2012-11-23",
  "value": 82
}, {
  "date": "2012-11-24",
  "value": 73
}, {
  "date": "2012-11-25",
  "value": 71
}, {
  "date": "2012-11-26",
  "value": 75
}, {
  "date": "2012-11-27",
  "value": 79
}, {
  "date": "2012-11-28",
  "value": 70
}, {
  "date": "2012-11-29",
  "value": 73
}, {
  "date": "2012-11-30",
  "value": 61
}, {
  "date": "2012-12-01",
  "value": 62
}, {
  "date": "2012-12-02",
  "value": 66
}, {
  "date": "2012-12-03",
  "value": 65
}, {
  "date": "2012-12-04",
  "value": 73
}, {
  "date": "2012-12-05",
  "value": 79
}, {
  "date": "2012-12-06",
  "value": 78
}, {
  "date": "2012-12-07",
  "value": 78
}, {
  "date": "2012-12-08",
  "value": 78
}, {
  "date": "2012-12-09",
  "value": 74
}, {
  "date": "2012-12-10",
  "value": 73
}, {
  "date": "2012-12-11",
  "value": 75
}, {
  "date": "2012-12-12",
  "value": 70
}, {
  "date": "2012-12-13",
  "value": 77
}, {
  "date": "2012-12-14",
  "value": 67
}, {
  "date": "2012-12-15",
  "value": 62
}, {
  "date": "2012-12-16",
  "value": 64
}, {
  "date": "2012-12-17",
  "value": 61
}, {
  "date": "2012-12-18",
  "value": 59
}, {
  "date": "2012-12-19",
  "value": 53
}, {
  "date": "2012-12-20",
  "value": 54
}, {
  "date": "2012-12-21",
  "value": 56
}, {
  "date": "2012-12-22",
  "value": 59
}, {
  "date": "2012-12-23",
  "value": 58
}, {
  "date": "2012-12-24",
  "value": 55
}, {
  "date": "2012-12-25",
  "value": 52
}, {
  "date": "2012-12-26",
  "value": 54
}, {
  "date": "2012-12-27",
  "value": 50
}, {
  "date": "2012-12-28",
  "value": 50
}, {
  "date": "2012-12-29",
  "value": 51
}, {
  "date": "2012-12-30",
  "value": 52
}, {
  "date": "2012-12-31",
  "value": 58
}, {
  "date": "2013-01-01",
  "value": 60
}, {
  "date": "2013-01-02",
  "value": 67
}, {
  "date": "2013-01-03",
  "value": 64
}, {
  "date": "2013-01-04",
  "value": 66
}, {
  "date": "2013-01-05",
  "value": 60
}, {
  "date": "2013-01-06",
  "value": 63
}, {
  "date": "2013-01-07",
  "value": 61
}, {
  "date": "2013-01-08",
  "value": 60
}, {
  "date": "2013-01-09",
  "value": 65
}, {
  "date": "2013-01-10",
  "value": 75
}, {
  "date": "2013-01-11",
  "value": 77
}, {
  "date": "2013-01-12",
  "value": 78
}, {
  "date": "2013-01-13",
  "value": 70
}, {
  "date": "2013-01-14",
  "value": 70
}, {
  "date": "2013-01-15",
  "value": 73
}, {
  "date": "2013-01-16",
  "value": 71
}, {
  "date": "2013-01-17",
  "value": 74
}, {
  "date": "2013-01-18",
  "value": 78
}, {
  "date": "2013-01-19",
  "value": 85
}, {
  "date": "2013-01-20",
  "value": 82
}, {
  "date": "2013-01-21",
  "value": 83
}, {
  "date": "2013-01-22",
  "value": 88
}, {
  "date": "2013-01-23",
  "value": 85
}, {
  "date": "2013-01-24",
  "value": 85
}, {
  "date": "2013-01-25",
  "value": 80
}, {
  "date": "2013-01-26",
  "value": 87
}, {
  "date": "2013-01-27",
  "value": 84
}, {
  "date": "2013-01-28",
  "value": 83
}, {
  "date": "2013-01-29",
  "value": 84
}, {
  "date": "2013-01-30",
  "value": 81
} ];

// Create axes
var dateAxis = chart.xAxes.push(new am4charts.DateAxis());
dateAxis.renderer.grid.template.location = 0;
dateAxis.renderer.minGridDistance = 50;

var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());

// Create series
var series = chart.series.push(new am4charts.LineSeries());
series.dataFields.valueY = "value";
series.dataFields.dateX = "date";
series.strokeWidth = 3;
series.fillOpacity = 0.5;

// Add vertical scrollbar
chart.scrollbarY = new am4core.Scrollbar();
chart.scrollbarY.marginLeft = 0;

// Add cursor
chart.cursor = new am4charts.XYCursor();
chart.cursor.behavior = "zoomY";
chart.cursor.lineX.disabled = true;
}

#chartdiv {
  width: 100%;
  height: 500px;
}

<!-- Resources -->
<script src=".js"></script>
<script src=".js"></script>
<script src=".js"></script>
<div id="chartdiv"></div>

setInterval(function() {
  refresh();
}, 1000);

function refresh(){
// Themes begin
am4core.useTheme(am4themes_animated);
// Themes end

// Create chart instance
var chart = am4core.create("chartdiv", am4charts.XYChart);

// Add data
chart.data = [ {
  "date": "2012-07-27",
  "value": 13
}, {
  "date": "2012-07-28",
  "value": 11
}, {
  "date": "2012-07-29",
  "value": 15
}, {
  "date": "2012-07-30",
  "value": 16
}, {
  "date": "2012-07-31",
  "value": 18
}, {
  "date": "2012-08-01",
  "value": 13
}, {
  "date": "2012-08-02",
  "value": 22
}, {
  "date": "2012-08-03",
  "value": 23
}, {
  "date": "2012-08-04",
  "value": 20
}, {
  "date": "2012-08-05",
  "value": 17
}, {
  "date": "2012-08-06",
  "value": 16
}, {
  "date": "2012-08-07",
  "value": 18
}, {
  "date": "2012-08-08",
  "value": 21
}, {
  "date": "2012-08-09",
  "value": 26
}, {
  "date": "2012-08-10",
  "value": 24
}, {
  "date": "2012-08-11",
  "value": 29
}, {
  "date": "2012-08-12",
  "value": 32
}, {
  "date": "2012-08-13",
  "value": 18
}, {
  "date": "2012-08-14",
  "value": 24
}, {
  "date": "2012-08-15",
  "value": 22
}, {
  "date": "2012-08-16",
  "value": 18
}, {
  "date": "2012-08-17",
  "value": 19
}, {
  "date": "2012-08-18",
  "value": 14
}, {
  "date": "2012-08-19",
  "value": 15
}, {
  "date": "2012-08-20",
  "value": 12
}, {
  "date": "2012-08-21",
  "value": 8
}, {
  "date": "2012-08-22",
  "value": 9
}, {
  "date": "2012-08-23",
  "value": 8
}, {
  "date": "2012-08-24",
  "value": 7
}, {
  "date": "2012-08-25",
  "value": 5
}, {
  "date": "2012-08-26",
  "value": 11
}, {
  "date": "2012-08-27",
  "value": 13
}, {
  "date": "2012-08-28",
  "value": 18
}, {
  "date": "2012-08-29",
  "value": 20
}, {
  "date": "2012-08-30",
  "value": 29
}, {
  "date": "2012-08-31",
  "value": 33
}, {
  "date": "2012-09-01",
  "value": 42
}, {
  "date": "2012-09-02",
  "value": 35
}, {
  "date": "2012-09-03",
  "value": 31
}, {
  "date": "2012-09-04",
  "value": 47
}, {
  "date": "2012-09-05",
  "value": 52
}, {
  "date": "2012-09-06",
  "value": 46
}, {
  "date": "2012-09-07",
  "value": 41
}, {
  "date": "2012-09-08",
  "value": 43
}, {
  "date": "2012-09-09",
  "value": 40
}, {
  "date": "2012-09-10",
  "value": 39
}, {
  "date": "2012-09-11",
  "value": 34
}, {
  "date": "2012-09-12",
  "value": 29
}, {
  "date": "2012-09-13",
  "value": 34
}, {
  "date": "2012-09-14",
  "value": 37
}, {
  "date": "2012-09-15",
  "value": 42
}, {
  "date": "2012-09-16",
  "value": 49
}, {
  "date": "2012-09-17",
  "value": 46
}, {
  "date": "2012-09-18",
  "value": 47
}, {
  "date": "2012-09-19",
  "value": 55
}, {
  "date": "2012-09-20",
  "value": 59
}, {
  "date": "2012-09-21",
  "value": 58
}, {
  "date": "2012-09-22",
  "value": 57
}, {
  "date": "2012-09-23",
  "value": 61
}, {
  "date": "2012-09-24",
  "value": 59
}, {
  "date": "2012-09-25",
  "value": 67
}, {
  "date": "2012-09-26",
  "value": 65
}, {
  "date": "2012-09-27",
  "value": 61
}, {
  "date": "2012-09-28",
  "value": 66
}, {
  "date": "2012-09-29",
  "value": 69
}, {
  "date": "2012-09-30",
  "value": 71
}, {
  "date": "2012-10-01",
  "value": 67
}, {
  "date": "2012-10-02",
  "value": 63
}, {
  "date": "2012-10-03",
  "value": 46
}, {
  "date": "2012-10-04",
  "value": 32
}, {
  "date": "2012-10-05",
  "value": 21
}, {
  "date": "2012-10-06",
  "value": 18
}, {
  "date": "2012-10-07",
  "value": 21
}, {
  "date": "2012-10-08",
  "value": 28
}, {
  "date": "2012-10-09",
  "value": 27
}, {
  "date": "2012-10-10",
  "value": 36
}, {
  "date": "2012-10-11",
  "value": 33
}, {
  "date": "2012-10-12",
  "value": 31
}, {
  "date": "2012-10-13",
  "value": 30
}, {
  "date": "2012-10-14",
  "value": 34
}, {
  "date": "2012-10-15",
  "value": 38
}, {
  "date": "2012-10-16",
  "value": 37
}, {
  "date": "2012-10-17",
  "value": 44
}, {
  "date": "2012-10-18",
  "value": 49
}, {
  "date": "2012-10-19",
  "value": 53
}, {
  "date": "2012-10-20",
  "value": 57
}, {
  "date": "2012-10-21",
  "value": 60
}, {
  "date": "2012-10-22",
  "value": 61
}, {
  "date": "2012-10-23",
  "value": 69
}, {
  "date": "2012-10-24",
  "value": 67
}, {
  "date": "2012-10-25",
  "value": 72
}, {
  "date": "2012-10-26",
  "value": 77
}, {
  "date": "2012-10-27",
  "value": 75
}, {
  "date": "2012-10-28",
  "value": 70
}, {
  "date": "2012-10-29",
  "value": 72
}, {
  "date": "2012-10-30",
  "value": 70
}, {
  "date": "2012-10-31",
  "value": 72
}, {
  "date": "2012-11-01",
  "value": 73
}, {
  "date": "2012-11-02",
  "value": 67
}, {
  "date": "2012-11-03",
  "value": 68
}, {
  "date": "2012-11-04",
  "value": 65
}, {
  "date": "2012-11-05",
  "value": 71
}, {
  "date": "2012-11-06",
  "value": 75
}, {
  "date": "2012-11-07",
  "value": 74
}, {
  "date": "2012-11-08",
  "value": 71
}, {
  "date": "2012-11-09",
  "value": 76
}, {
  "date": "2012-11-10",
  "value": 77
}, {
  "date": "2012-11-11",
  "value": 81
}, {
  "date": "2012-11-12",
  "value": 83
}, {
  "date": "2012-11-13",
  "value": 80
}, {
  "date": "2012-11-14",
  "value": 81
}, {
  "date": "2012-11-15",
  "value": 87
}, {
  "date": "2012-11-16",
  "value": 82
}, {
  "date": "2012-11-17",
  "value": 86
}, {
  "date": "2012-11-18",
  "value": 80
}, {
  "date": "2012-11-19",
  "value": 87
}, {
  "date": "2012-11-20",
  "value": 83
}, {
  "date": "2012-11-21",
  "value": 85
}, {
  "date": "2012-11-22",
  "value": 84
}, {
  "date": "2012-11-23",
  "value": 82
}, {
  "date": "2012-11-24",
  "value": 73
}, {
  "date": "2012-11-25",
  "value": 71
}, {
  "date": "2012-11-26",
  "value": 75
}, {
  "date": "2012-11-27",
  "value": 79
}, {
  "date": "2012-11-28",
  "value": 70
}, {
  "date": "2012-11-29",
  "value": 73
}, {
  "date": "2012-11-30",
  "value": 61
}, {
  "date": "2012-12-01",
  "value": 62
}, {
  "date": "2012-12-02",
  "value": 66
}, {
  "date": "2012-12-03",
  "value": 65
}, {
  "date": "2012-12-04",
  "value": 73
}, {
  "date": "2012-12-05",
  "value": 79
}, {
  "date": "2012-12-06",
  "value": 78
}, {
  "date": "2012-12-07",
  "value": 78
}, {
  "date": "2012-12-08",
  "value": 78
}, {
  "date": "2012-12-09",
  "value": 74
}, {
  "date": "2012-12-10",
  "value": 73
}, {
  "date": "2012-12-11",
  "value": 75
}, {
  "date": "2012-12-12",
  "value": 70
}, {
  "date": "2012-12-13",
  "value": 77
}, {
  "date": "2012-12-14",
  "value": 67
}, {
  "date": "2012-12-15",
  "value": 62
}, {
  "date": "2012-12-16",
  "value": 64
}, {
  "date": "2012-12-17",
  "value": 61
}, {
  "date": "2012-12-18",
  "value": 59
}, {
  "date": "2012-12-19",
  "value": 53
}, {
  "date": "2012-12-20",
  "value": 54
}, {
  "date": "2012-12-21",
  "value": 56
}, {
  "date": "2012-12-22",
  "value": 59
}, {
  "date": "2012-12-23",
  "value": 58
}, {
  "date": "2012-12-24",
  "value": 55
}, {
  "date": "2012-12-25",
  "value": 52
}, {
  "date": "2012-12-26",
  "value": 54
}, {
  "date": "2012-12-27",
  "value": 50
}, {
  "date": "2012-12-28",
  "value": 50
}, {
  "date": "2012-12-29",
  "value": 51
}, {
  "date": "2012-12-30",
  "value": 52
}, {
  "date": "2012-12-31",
  "value": 58
}, {
  "date": "2013-01-01",
  "value": 60
}, {
  "date": "2013-01-02",
  "value": 67
}, {
  "date": "2013-01-03",
  "value": 64
}, {
  "date": "2013-01-04",
  "value": 66
}, {
  "date": "2013-01-05",
  "value": 60
}, {
  "date": "2013-01-06",
  "value": 63
}, {
  "date": "2013-01-07",
  "value": 61
}, {
  "date": "2013-01-08",
  "value": 60
}, {
  "date": "2013-01-09",
  "value": 65
}, {
  "date": "2013-01-10",
  "value": 75
}, {
  "date": "2013-01-11",
  "value": 77
}, {
  "date": "2013-01-12",
  "value": 78
}, {
  "date": "2013-01-13",
  "value": 70
}, {
  "date": "2013-01-14",
  "value": 70
}, {
  "date": "2013-01-15",
  "value": 73
}, {
  "date": "2013-01-16",
  "value": 71
}, {
  "date": "2013-01-17",
  "value": 74
}, {
  "date": "2013-01-18",
  "value": 78
}, {
  "date": "2013-01-19",
  "value": 85
}, {
  "date": "2013-01-20",
  "value": 82
}, {
  "date": "2013-01-21",
  "value": 83
}, {
  "date": "2013-01-22",
  "value": 88
}, {
  "date": "2013-01-23",
  "value": 85
}, {
  "date": "2013-01-24",
  "value": 85
}, {
  "date": "2013-01-25",
  "value": 80
}, {
  "date": "2013-01-26",
  "value": 87
}, {
  "date": "2013-01-27",
  "value": 84
}, {
  "date": "2013-01-28",
  "value": 83
}, {
  "date": "2013-01-29",
  "value": 84
}, {
  "date": "2013-01-30",
  "value": 81
} ];

// Create axes
var dateAxis = chart.xAxes.push(new am4charts.DateAxis());
dateAxis.renderer.grid.template.location = 0;
dateAxis.renderer.minGridDistance = 50;

var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());

// Create series
var series = chart.series.push(new am4charts.LineSeries());
series.dataFields.valueY = "value";
series.dataFields.dateX = "date";
series.strokeWidth = 3;
series.fillOpacity = 0.5;

// Add vertical scrollbar
chart.scrollbarY = new am4core.Scrollbar();
chart.scrollbarY.marginLeft = 0;

// Add cursor
chart.cursor = new am4charts.XYCursor();
chart.cursor.behavior = "zoomY";
chart.cursor.lineX.disabled = true;
}

#chartdiv {
  width: 100%;
  height: 500px;
}

<!-- Resources -->
<script src="https://www.amcharts./lib/4/core.js"></script>
<script src="https://www.amcharts./lib/4/charts.js"></script>
<script src="https://www.amcharts./lib/4/themes/animated.js"></script>
<div id="chartdiv"></div>

Here is my correct code for rendering my chart but not real time

//get data from database every 2secs
$interval(function () {
    Blooddonation.donationAdmin().then(function(data) {
        app.date = data.data.date; //store the items here
    });
}, 2000);

//initialize chart
function initChart() {
var data = [];
 for(let key in app.date) {
        data.push({
            "date": app.date[key]._id,
            "value": app.date[key].count
        });
  }
var dateAxis = chart.xAxes.push(new am4charts.DateAxis());
var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());

var series = chart.series.push(new am4charts.LineSeries());
series.dataFields.valueY = "value";
series.dataFields.dateX = "date";
}

Here is my items from data.data.date:
[ { _id: '2018-12-01', count: 1 },
  { _id: '2018-12-09', count: 2 },
  { _id: '2018-12-15', count: 3 },
  { _id: '2018-12-30', count: 5 },
  { _id: '2019-01-10', count: 2 },
  { _id: '2019-01-21', count: 3 } ]

Share Improve this question edited Feb 5, 2019 at 6:19 asked Feb 5, 2019 at 3:44 Godshand 6317 silver badges17 bronze badges

1 there are 2 issues which I see and if I understood you correctly. One is that you create your chart inside refresh function and you call it from your timeout function so, the chart is created again and again. second is the data, the data object is not changing so, what you need to do,setTimeout should be calling your function which is responsible to get the data from the back end. Once you observe that there is a change in your data, you should be calling another function to do the creation of amchart. – Manit Commented Feb 5, 2019 at 4:04

Add a ment |

1 Answer 1

Sorted by: Reset to default 6

I would remend you to check the dynamic updates section in the documentaion.

Your chart creation is encapsulated in the refresh function. That means if will try to draw the chart every time refresh is called. Instead you need to instantiate the chart once and only update the data using the addData method:

chart.addData(dataItem, 1);

Based on your updated code, you could try something like shown below assuming app exists in the context:

chart.events.on('ready', function (e) {

    $interval(function () {
        Blooddonation.donationAdmin().then(function(data) {
            app.date = data.data.date; //store the items here

            e.target.addData(app.date.map(function (item) {
                return {
                    date: item._id,
                    value: item.count
                };
            }), app.date.length - 1);
        });
    }, 2000);

});

Check the updated example below:

// Themes begin
am4core.useTheme(am4themes_animated);
// Themes end

// Create chart instance
var chart = am4core.create("chartdiv", am4charts.XYChart);

// Add data
chart.data = [ {
  "date": "2012-07-27",
  "value": 13
}, {
  "date": "2012-07-28",
  "value": 11
}, {
  "date": "2012-07-29",
  "value": 15
}, {
  "date": "2012-07-30",
  "value": 16
}, {
  "date": "2012-07-31",
  "value": 18
}, {
  "date": "2012-08-01",
  "value": 13
}, {
  "date": "2012-08-02",
  "value": 22
}, {
  "date": "2012-08-03",
  "value": 23
}, {
  "date": "2012-08-04",
  "value": 20
}, {
  "date": "2012-08-05",
  "value": 17
}, {
  "date": "2012-08-06",
  "value": 16
}, {
  "date": "2012-08-07",
  "value": 18
}, {
  "date": "2012-08-08",
  "value": 21
}, {
  "date": "2012-08-09",
  "value": 26
}, {
  "date": "2012-08-10",
  "value": 24
}, {
  "date": "2012-08-11",
  "value": 29
}, {
  "date": "2012-08-12",
  "value": 32
}, {
  "date": "2012-08-13",
  "value": 18
}, {
  "date": "2012-08-14",
  "value": 24
}, {
  "date": "2012-08-15",
  "value": 22
}, {
  "date": "2012-08-16",
  "value": 18
}, {
  "date": "2012-08-17",
  "value": 19
}, {
  "date": "2012-08-18",
  "value": 14
}, {
  "date": "2012-08-19",
  "value": 15
}, {
  "date": "2012-08-20",
  "value": 12
}, {
  "date": "2012-08-21",
  "value": 8
}, {
  "date": "2012-08-22",
  "value": 9
}, {
  "date": "2012-08-23",
  "value": 8
}, {
  "date": "2012-08-24",
  "value": 7
}, {
  "date": "2012-08-25",
  "value": 5
}, {
  "date": "2012-08-26",
  "value": 11
}, {
  "date": "2012-08-27",
  "value": 13
}, {
  "date": "2012-08-28",
  "value": 18
}, {
  "date": "2012-08-29",
  "value": 20
}, {
  "date": "2012-08-30",
  "value": 29
}, {
  "date": "2012-08-31",
  "value": 33
}, {
  "date": "2012-09-01",
  "value": 42
}, {
  "date": "2012-09-02",
  "value": 35
}, {
  "date": "2012-09-03",
  "value": 31
}, {
  "date": "2012-09-04",
  "value": 47
}, {
  "date": "2012-09-05",
  "value": 52
}, {
  "date": "2012-09-06",
  "value": 46
}, {
  "date": "2012-09-07",
  "value": 41
}, {
  "date": "2012-09-08",
  "value": 43
}, {
  "date": "2012-09-09",
  "value": 40
}, {
  "date": "2012-09-10",
  "value": 39
}, {
  "date": "2012-09-11",
  "value": 34
}, {
  "date": "2012-09-12",
  "value": 29
}, {
  "date": "2012-09-13",
  "value": 34
}, {
  "date": "2012-09-14",
  "value": 37
}, {
  "date": "2012-09-15",
  "value": 42
}, {
  "date": "2012-09-16",
  "value": 49
}, {
  "date": "2012-09-17",
  "value": 46
}, {
  "date": "2012-09-18",
  "value": 47
}, {
  "date": "2012-09-19",
  "value": 55
}, {
  "date": "2012-09-20",
  "value": 59
}, {
  "date": "2012-09-21",
  "value": 58
}, {
  "date": "2012-09-22",
  "value": 57
}, {
  "date": "2012-09-23",
  "value": 61
}, {
  "date": "2012-09-24",
  "value": 59
}, {
  "date": "2012-09-25",
  "value": 67
}, {
  "date": "2012-09-26",
  "value": 65
}, {
  "date": "2012-09-27",
  "value": 61
}, {
  "date": "2012-09-28",
  "value": 66
}, {
  "date": "2012-09-29",
  "value": 69
}, {
  "date": "2012-09-30",
  "value": 71
}, {
  "date": "2012-10-01",
  "value": 67
}, {
  "date": "2012-10-02",
  "value": 63
}, {
  "date": "2012-10-03",
  "value": 46
}, {
  "date": "2012-10-04",
  "value": 32
}, {
  "date": "2012-10-05",
  "value": 21
}, {
  "date": "2012-10-06",
  "value": 18
}, {
  "date": "2012-10-07",
  "value": 21
}, {
  "date": "2012-10-08",
  "value": 28
}, {
  "date": "2012-10-09",
  "value": 27
}, {
  "date": "2012-10-10",
  "value": 36
}, {
  "date": "2012-10-11",
  "value": 33
}, {
  "date": "2012-10-12",
  "value": 31
}, {
  "date": "2012-10-13",
  "value": 30
}, {
  "date": "2012-10-14",
  "value": 34
}, {
  "date": "2012-10-15",
  "value": 38
}, {
  "date": "2012-10-16",
  "value": 37
}, {
  "date": "2012-10-17",
  "value": 44
}, {
  "date": "2012-10-18",
  "value": 49
}, {
  "date": "2012-10-19",
  "value": 53
}, {
  "date": "2012-10-20",
  "value": 57
}, {
  "date": "2012-10-21",
  "value": 60
}, {
  "date": "2012-10-22",
  "value": 61
}, {
  "date": "2012-10-23",
  "value": 69
}, {
  "date": "2012-10-24",
  "value": 67
}, {
  "date": "2012-10-25",
  "value": 72
}, {
  "date": "2012-10-26",
  "value": 77
}, {
  "date": "2012-10-27",
  "value": 75
}, {
  "date": "2012-10-28",
  "value": 70
}, {
  "date": "2012-10-29",
  "value": 72
}, {
  "date": "2012-10-30",
  "value": 70
}, {
  "date": "2012-10-31",
  "value": 72
}, {
  "date": "2012-11-01",
  "value": 73
}, {
  "date": "2012-11-02",
  "value": 67
}, {
  "date": "2012-11-03",
  "value": 68
}, {
  "date": "2012-11-04",
  "value": 65
}, {
  "date": "2012-11-05",
  "value": 71
}, {
  "date": "2012-11-06",
  "value": 75
}, {
  "date": "2012-11-07",
  "value": 74
}, {
  "date": "2012-11-08",
  "value": 71
}, {
  "date": "2012-11-09",
  "value": 76
}, {
  "date": "2012-11-10",
  "value": 77
}, {
  "date": "2012-11-11",
  "value": 81
}, {
  "date": "2012-11-12",
  "value": 83
}, {
  "date": "2012-11-13",
  "value": 80
}, {
  "date": "2012-11-14",
  "value": 81
}, {
  "date": "2012-11-15",
  "value": 87
}, {
  "date": "2012-11-16",
  "value": 82
}, {
  "date": "2012-11-17",
  "value": 86
}, {
  "date": "2012-11-18",
  "value": 80
}, {
  "date": "2012-11-19",
  "value": 87
}, {
  "date": "2012-11-20",
  "value": 83
}, {
  "date": "2012-11-21",
  "value": 85
}, {
  "date": "2012-11-22",
  "value": 84
}, {
  "date": "2012-11-23",
  "value": 82
}, {
  "date": "2012-11-24",
  "value": 73
}, {
  "date": "2012-11-25",
  "value": 71
}, {
  "date": "2012-11-26",
  "value": 75
}, {
  "date": "2012-11-27",
  "value": 79
}, {
  "date": "2012-11-28",
  "value": 70
}, {
  "date": "2012-11-29",
  "value": 73
}, {
  "date": "2012-11-30",
  "value": 61
}, {
  "date": "2012-12-01",
  "value": 62
}, {
  "date": "2012-12-02",
  "value": 66
}, {
  "date": "2012-12-03",
  "value": 65
}, {
  "date": "2012-12-04",
  "value": 73
}, {
  "date": "2012-12-05",
  "value": 79
}, {
  "date": "2012-12-06",
  "value": 78
}, {
  "date": "2012-12-07",
  "value": 78
}, {
  "date": "2012-12-08",
  "value": 78
}, {
  "date": "2012-12-09",
  "value": 74
}, {
  "date": "2012-12-10",
  "value": 73
}, {
  "date": "2012-12-11",
  "value": 75
}, {
  "date": "2012-12-12",
  "value": 70
}, {
  "date": "2012-12-13",
  "value": 77
}, {
  "date": "2012-12-14",
  "value": 67
}, {
  "date": "2012-12-15",
  "value": 62
}, {
  "date": "2012-12-16",
  "value": 64
}, {
  "date": "2012-12-17",
  "value": 61
}, {
  "date": "2012-12-18",
  "value": 59
}, {
  "date": "2012-12-19",
  "value": 53
}, {
  "date": "2012-12-20",
  "value": 54
}, {
  "date": "2012-12-21",
  "value": 56
}, {
  "date": "2012-12-22",
  "value": 59
}, {
  "date": "2012-12-23",
  "value": 58
}, {
  "date": "2012-12-24",
  "value": 55
}, {
  "date": "2012-12-25",
  "value": 52
}, {
  "date": "2012-12-26",
  "value": 54
}, {
  "date": "2012-12-27",
  "value": 50
}, {
  "date": "2012-12-28",
  "value": 50
}, {
  "date": "2012-12-29",
  "value": 51
}, {
  "date": "2012-12-30",
  "value": 52
}, {
  "date": "2012-12-31",
  "value": 58
}, {
  "date": "2013-01-01",
  "value": 60
}, {
  "date": "2013-01-02",
  "value": 67
}, {
  "date": "2013-01-03",
  "value": 64
}, {
  "date": "2013-01-04",
  "value": 66
}, {
  "date": "2013-01-05",
  "value": 60
}, {
  "date": "2013-01-06",
  "value": 63
}, {
  "date": "2013-01-07",
  "value": 61
}, {
  "date": "2013-01-08",
  "value": 60
}, {
  "date": "2013-01-09",
  "value": 65
}, {
  "date": "2013-01-10",
  "value": 75
}, {
  "date": "2013-01-11",
  "value": 77
}, {
  "date": "2013-01-12",
  "value": 78
}, {
  "date": "2013-01-13",
  "value": 70
}, {
  "date": "2013-01-14",
  "value": 70
}, {
  "date": "2013-01-15",
  "value": 73
}, {
  "date": "2013-01-16",
  "value": 71
}, {
  "date": "2013-01-17",
  "value": 74
}, {
  "date": "2013-01-18",
  "value": 78
}, {
  "date": "2013-01-19",
  "value": 85
}, {
  "date": "2013-01-20",
  "value": 82
}, {
  "date": "2013-01-21",
  "value": 83
}, {
  "date": "2013-01-22",
  "value": 88
}, {
  "date": "2013-01-23",
  "value": 85
}, {
  "date": "2013-01-24",
  "value": 85
}, {
  "date": "2013-01-25",
  "value": 80
}, {
  "date": "2013-01-26",
  "value": 87
}, {
  "date": "2013-01-27",
  "value": 84
}, {
  "date": "2013-01-28",
  "value": 83
}, {
  "date": "2013-01-29",
  "value": 84
}, {
  "date": "2013-01-30",
  "value": 81
} ];

// Create axes
var dateAxis = chart.xAxes.push(new am4charts.DateAxis());
dateAxis.renderer.grid.template.location = 0;
dateAxis.renderer.minGridDistance = 50;

var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());

// Create series
var series = chart.series.push(new am4charts.LineSeries());
series.dataFields.valueY = "value";
series.dataFields.dateX = "date";
series.strokeWidth = 3;
series.fillOpacity = 0.5;

// Add vertical scrollbar
chart.scrollbarY = new am4core.Scrollbar();
chart.scrollbarY.marginLeft = 0;

// Add cursor
chart.cursor = new am4charts.XYCursor();
chart.cursor.behavior = "zoomY";
chart.cursor.lineX.disabled = true;

chart.events.on('ready', function (e) {

  setInterval(function () {
  
    var data = e.target.data,
        item = data[data.length - 1],
        lastDate = new Date(item.date),
        newDate = new Date(lastDate.setDate(lastDate.getDate() + 2)),
        fullYear = newDate.getFullYear(),
        month = newDate.getMonth() + 1,
        day = newDate.getDate();
        
    if (month < 10)
      month = '0' + month;
      
    if (day < 10)
      day = '0' + day;
        
    chart.addData({
      date: [fullYear, month, day].join('-'),
      value: item.value + Math.floor(Math.random() * 9) - 5
    }, 1);
  }, 1000);
});

// chart.events.on('ready', function (e) {
// 
//     $interval(function () {
//         Blooddonation.donationAdmin().then(function(data) {
//             app.date = data.data.date; //store the items here
// 
//             e.target.addData(app.date.map(function (item) {
//                 return {
//                     date: item._id,
//                     value: item.count
//                 };
//             }), app.date.length - 1);
//         });
//     }, 2000);
// 
// });

#chartdiv {
  width: 100%;
  height: 400px;
}

<!-- Resources -->
<script src="https://www.amcharts./lib/4/core.js"></script>
<script src="https://www.amcharts./lib/4/charts.js"></script>
<script src="https://www.amcharts./lib/4/themes/animated.js"></script>
<div id="chartdiv"></div>

科技改变生活-雨落星辰 - 所有的伟大,都源于一个勇敢的开始

javascript - Amcharts refresh or validate data every seconds - Stack Overflow

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