Develop Reference

Switching to JSON data in AmCharts not working

New user to Amcharts (and programming!) and was trying to use one of their examples (https://codepen.io/team/amcharts/pen/gOpWroQ),
but when I pull the data from and external JSON file, it doesn't work properly. The JSON structure and format is correct and I literally copied the data from the JSON file into the var data [] and it works fine.
The pen is here: https://codepen.io/moneycarlo/pen/zYKdyGz (however I can't host a json file).
Line 10 is where I'm loading the JSON data, but if I remove the var data info and uncomment out line 10, the result doesn't draw 4 lines. Instead, it's 1 line with multiple stacked points on it for each date.
I'm guessing it's something in the pre-processor. I was under the impression that when you loaded from external data like the JSON it would automatically be assigned to the data property and those functions would work the same.
What am I missing?
am4core.useTheme(am4themes_animated);
// Source data
var data = [
{"date":"2019-07-05","domain":"aol.com","hits":"119489"},{"date":"2019-07-05","domain":"gmail.com","hits":"295834"},{"date":"2019-07-05","domain":"hotmail.com","hits":"8000"},{"date":"2019-07-05","domain":"yahoo.com","hits":"324263"},{"date":"2019-07-06","domain":"aol.com","hits":"195042"},{"date":"2019-07-06","domain":"gmail.com","hits":"258402"},{"date":"2019-07-06","domain":"hotmail.com","hits":"100000"},{"date":"2019-07-06","domain":"yahoo.com","hits":"427865"}
];
// Create chart instance
var chart = am4core.create("chartdiv", am4charts.XYChart);
//chart.dataSource.url = "data_1.php";
// Create axes
var dateAxis = chart.xAxes.push(new am4charts.DateAxis());
dateAxis.renderer.grid.template.location = 0;
dateAxis.renderer.minGridDistance = 30;
var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());
chart.colors.list = [
am4core.color("red"),
am4core.color("blue"),
am4core.color("green")
];
// Create series
function createSeries(field, name, id) {
var series = chart.series.push(new am4charts.LineSeries());
series.dataFields.valueY = "hits";
series.dataFields.dateX = "date";
series.name = name;
series.tooltipText = "{dateX}: [b]{valueY}[/]";
series.strokeWidth = 2;
var bullet = series.bullets.push(new am4charts.CircleBullet());
bullet.circle.stroke = am4core.color("#fff");
bullet.circle.strokeWidth = 2;
// Add data pre-processor
series.data = data;
series.events.on("beforedatavalidated", function(ev) {
var source = ev.target.data;
var data = [];
for(var i = 0; i < source.length; i++) {
var row = source[i];
if (row.domain == id) {
data.push(row);
}
}
ev.target.data = data;
});
return series;
}
createSeries("hits", "Yahoo", "yahoo.com");
createSeries("hits", "Hotmail", "hotmail.com");
createSeries("hits", "Gmail", "gmail.com");
chart.legend = new am4charts.Legend();
chart.cursor = new am4charts.XYCursor();

dataSource assigns the data into the data array at the chart object, not at the series like the rest of your code does. You'll need to hook into the dataSource's parseended event and process each series with the existing beforedatavalidated code. You'll also want to keep track of the id value in your createSeries method as it won't be available in the parseended event:
chart.dataSource.events.on('parseended', function(ev){
// process parsed data into each series' data array
ev.target.component.series.each(function(series) {
var source = ev.target.data;
var data = [];
for(var i = 0; i < source.length; i++) {
var row = source[i];
if (row.domain == series.id) {
data.push(row);
}
}
series.data = data;
});
// clear out data array so that it isn't re-assigned to the chart
// data array
ev.target.data = [];
});
// ...
function createSeries(field, name, id) {
var series = chart.series.push(new am4charts.LineSeries());
series.dataFields.valueY = "hits";
series.dataFields.dateX = "date";
series.id = id; //store id for later
series.name = name;
series.tooltipText = "{dateX}: [b]{valueY}[/]";
series.strokeWidth = 2;
var bullet = series.bullets.push(new am4charts.CircleBullet());
bullet.circle.stroke = am4core.color("#fff");
bullet.circle.strokeWidth = 2;
return series;
}
Codepen

am4charts doesn't worked for time variables but its worked fine for autoid variables

I was shown my data in am4charts.Intially i was create x axis with id field but now i want time fields. but it doesn't worked when i was use time field,it worked fine when i was using id field.here is my java script coding to show charts.
var chart2 = am4core.create("chartdiv1", am4charts.XYChart);
var data=[];
var open = 0;
var close = 0;
<?
$sql=mysqli_query($conn, "select tyme as date, rx as rx, tx as tx from log_vps_bw");
while($rs=mysqli_fetch_assoc($sql))
{
?>
open = <?echo $rs['rx'];?>;
close = <?echo $rs['tx'];?>;
date = <?echo $rs['date'];?>;
data.push({ date: date, open: open, close: close });
<? } ?>
chart2.data = data;
var dateAxis = chart2.xAxes.push(new am4charts.DateAxis());
dateAxis.renderer.grid.template.location = 0;
dateAxis.renderer.minGridDistance = 50;
var valueAxis = chart2.yAxes.push(new am4charts.ValueAxis());
valueAxis.tooltip.disabled = true;
var series = chart2.series.push(new am4charts.LineSeries());
series.dataFields.dateX = "date";
series.dataFields.openValueY = "open";
series.dataFields.valueY = "close";
series.tooltipText = "rx: {openValueY.value} tx: {valueY.value}";
series.sequencedInterpolation = true;
series.fillOpacity = 0.3;
series.strokeWidth = 3;
series.defaultState.transitionDuration = 1000;
series.tensionX = 0.8;
var series2 = chart2.series.push(new am4charts.LineSeries());
series2.dataFields.dateX = "date";
series2.dataFields.valueY = "open";
series2.sequencedInterpolation = true;
series2.defaultState.transitionDuration = 1500;
series.strokeWidth = 3;
series2.stroke = chart2.colors.getIndex(6);
series2.tensionX = 0.8;
// Add vertical scrollbar
chart2.scrollbarY = new am4core.Scrollbar();
chart2.scrollbarY.marginLeft = 0;
chart2.cursor = new am4charts.XYCursor();
chart2.cursor.xAxis = dateAxis;
chart2.scrollbarX = new am4core.Scrollbar();
chart.cursor.behavior = "zoomX";
Then my time format is like as 11:36:52. in query tyme filed is have time value

explode time variable which comes from database first.assume my variable and value is
$rs['date'] = "10:30:45";
$time = explode(":",$rs['dt']);
in my coding change
date = <?php $rs['date']; ?>;
into
date = new Date(0,0,0,<?= $time[0]; ?>,<?= $time[1]; ?>,<?= $time[2]; ?>,);
then set interval for label after var dateaxis line like
dateAxis.baseInterval = {
"timeUnit": "second",
"count": 1
};
this changes are make my chart as time based one.its working fine for me thank you.

Getting the same element from database to AmCharts using Primefaces and Javascript

Good day.
Task:
Output diagram using data from DB via AmCharts.
Backend: Primefaces + MySQL
I transfer data to AmCharts using this code:
<script type="text/javascript">
var chart;
var data = [];
for (var i = 0; i < '${countryMB.list.size()}'; i++) {
data.push(
{
country: '${countryMB.list.get(i).getName()}',
gdp: '${countryMB.list.get(i).getGdp()}'
}
);
}
var chartData = data;
AmCharts.ready(function () {
// SERIAL CHART
chart = new AmCharts.AmSerialChart();
chart.dataProvider = chartData;
chart.categoryField = "country";
chart.startDuration = 1;
// AXES
// category
var categoryAxis = chart.categoryAxis;
categoryAxis.labelRotation = 90;
categoryAxis.gridPosition = "start";
// GRAPH
var graph = new AmCharts.AmGraph();
graph.valueField = "gdp";
graph.balloonText = "[[category]]: [[value]]";
graph.type = "column";
graph.lineAlpha = 0;
graph.fillAlphas = 0.8;
chart.addGraph(graph);
chart.write("chartdiv");
});
</script>
countryMB - primefaces component and list - method that gets all elements from database.
And as a result I have data only for one element, that repeats many times.
Like this:
I don't understand the reason.
Thanks for Your help.

Display date in x Axis value using amCharts

I've a AmSerialChart with three AmGraph on whcih I've formatted the balloonText like this:
grp.balloonText = "<small><b>Date: [[category]]</b></small><br>[[value]]";
The problem with the category (x value) is that is also displayed in the balloonText with the following format: "MMM DD, YYYY". How can I display this date in another way?
I've checked dateFormats in the categoryaxis and dataDateFormat but that only changes the bottom value.
Here's the full code so far:
<script src="amcharts/amcharts.js" type="text/javascript"></script>
<script src="amcharts/serial.js" type="text/javascript"></script>
<script type="text/javascript">
var chart;
var chartData = <% properties.get("jsonData") %>;
var chartTitles = <% properties.get("jsonTitles") %>;
AmCharts.ready(function () {
// SERIAL CHART
chart = new AmCharts.AmSerialChart();
chart.pathToImages = "amcharts/images/";
chart.dataProvider = chartData;
chart.categoryField = "date";
chart.dataDateFormat = [{period:'fff',format:'JJ:NN:SS'},{period:'ss',format:'JJ:NN:SS'},{period:'mm',format:'JJ:NN:SS'},{period:'hh',format:'JJ:NN:SS'},{period:'DD',format:'JJ:NN:SS'},{period:'WW',format:'JJ:NN:SS'},{period:'MM',format:'JJ:NN:SS'},{period:'YYYY',format:'JJ:NN:SS'}];
// listen for "dataUpdated" event (fired when chart is inited) and call zoomChart method when it happens
// chart.addListener("dataUpdated", zoomChart);
// AXES
// category
var categoryAxis = chart.categoryAxis;
categoryAxis.parseDates = true; // as our data is date-based, we set parseDates to true
categoryAxis.minPeriod = "ss";
categoryAxis.minorGridEnabled = true;
categoryAxis.axisColor = "#DADADA";
// categoryAxis.dateFormats = [{period:'fff',format:'JJ:NN:SS'},{period:'ss',format:'JJ:NN:SS'},{period:'mm',format:'JJ:NN:SS'},{period:'hh',format:'JJ:NN:SS'},{period:'DD',format:'JJ:NN:SS'},{period:'WW',format:'JJ:NN:SS'},{period:'MM',format:'JJ:NN:SS'},{period:'YYYY',format:'JJ:NN:SS'}];
var vAxis = new AmCharts.ValueAxis();
chart.addValueAxis(vAxis);
for (var i = 0; i < chartTitles.length; i++) {
var grp = new AmCharts.AmGraph();
grp.valueField = "d"+i;
grp.title = chartTitles[i];
grp.type = "line";
grp.valueAxis = vAxis; // indicate which axis should be used
grp.lineThickness = 1;
grp.bullet = "round";
grp.labelPosition = "right";
grp.balloonText = "<small><b>Date: [[category]]</b></small><br>[[value]]";
grp.balloonText = "[[value]], [[description]], [[percents]], [[open]], [[total]], [[category]]";
grp.showBalloon = true;
grp.bulletSize = 1;
grp.bulletBorderThickness = 6;
grp.dashLengthField = "dashLength";
chart.addGraph(grp);
}
// SCROLLBAR
var chartScrollbar = new AmCharts.ChartScrollbar();
chart.addChartScrollbar(chartScrollbar);
// LEGEND
var legend = new AmCharts.AmLegend();
legend.marginLeft = 180;
legend.useGraphSettings = true;
chart.addLegend(legend);
// WRITE
chart.write("chartdiv");
});
</script>
<div id="chartdiv" style="width: 100%; height: 360px;"></div>

Good questions, which helped me to find out that I have a missing property in the docs. In case you don't use ChartCursor, you should use chart.balloonDateFormat property to format the date.

How to make a page resize without resizing?

How do I make a page resize without resizing it?
I have a Javascript which runs to get data from a text file followed by plotting a graph on Amcharts. The problem is that some axis components of the chart are missing when it is first plotted and still missing when I attempt to refresh (F5).
The missing components all come out when I resize the browser, so I am wondering what is it that the resizing does and how do I mimic a resize after the chart has been drawn without actually resizing?
The full html version of the source is right here.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>amCharts Example</title>
<link rel="stylesheet" href="style.css" type="text/css">
<script src="javascript/amcharts.js" type="text/javascript"></script>
<script type="text/javascript">
var chart;
var chartData = [];
// declaring variables
var dataProvider;
// this method called after all page contents are loaded
var srcFrame;
window.onload = function() {
//generateChartData();
//createChart();
loadOuter('data.txt');
//loadOuter('Test.txt');
//loadCSV('data.txt');
}
//External content into a layer
function loadOuter(doc) {
srcFrame = document.getElementById("hiddenContent");
srcFrame.src = doc;
// workaround for missing onLoad event in IFRAME for NN6
if (!srcFrame.onload) {
if (srcFrame.contentDocument){
srcContent=srcFrame.contentDocument.getElementsByTagName("BODY")[0].innerHTML;
}
else if (srcFrame.contentWindow){
srcContent=srcFrame.contentWindow.document.body.innerHTML;
}
srcContent = srcContent.substring(5,srcContent.length-6)
parseCSV(srcContent);
//setTimeout("transferHTML()", 1000)
}
}
function parseCSV(data){
//replace UNIX new lines
data = data.replace (/\r\n/g, "\n");
//replace MAC new lines
data = data.replace (/\r/g, "\n");
//split into rows
var rows = data.split("\n");
// create array which will hold our data:
dataProvider = [];
// loop through all rows
for (var i = 0; i < rows.length; i++){
// this line helps to skip empty rows
if (rows[i]) {
// our columns are separated by comma
var column = rows[i].split(",");
// column is array now
// first item is date
var date = column[0];
var myDate= new Date();
var dateparse = date.split("-");
myDate.setFullYear(dateparse[0],dateparse[1],dateparse[2]);
//alert(myDate);
// second item is value of the second column
var value1 = column[1];
// third item is value of the fird column
var value2 = column[2];
// create object which contains all these items:
chartData.push({
date: myDate,
visits: value1,
hits: value2,
});
//var dataObject = {date:date, value1:value1, value2:value2};
// add object to dataProvider array
//dataProvider.push(dataObject);
}
}
// set data provider to the chart
chart.dataProvider = chartData;
// this will force chart to rebuild using new data
chart.validateData();
}
// generate some random data, quite different range
function generateChartData() {
var firstDate = new Date();
firstDate.setDate(firstDate.getDate() - 50);
//alert(firstDate);
//alert(firstDate.getDate());
for (var i = 0; i < 50; i++) {
var newDate = new Date(firstDate);
newDate.setDate(newDate.getDate() + i);
//alert(newDate);
var visits = Math.round(Math.random() * 40) + 100;
var hits = Math.round(Math.random() * 80) + 500;
chartData.push({
date: newDate,
visits: visits,
hits: hits,
});
}
}
//function createChart(){
AmCharts.ready(function () {
//loadOuter('data.txt');
// generate some random data first
//generateChartData();
// SERIAL CHART
chart = new AmCharts.AmSerialChart();
chart.pathToImages = "amcharts/images/";
chart.zoomOutButton = {
backgroundColor: '#000000',
backgroundAlpha: 0.15
};
chart.dataProvider = chartData;
chart.categoryField = "date";
// listen for "dataUpdated" event (fired when chart is inited) and call zoomChart method when it happens
chart.addListener("dataUpdated", zoomChart);
// AXES
// category
var categoryAxis = chart.categoryAxis;
categoryAxis.parseDates = true; // as our data is date-based, we set parseDates to true
categoryAxis.minPeriod = "DD"; // our data is daily, so we set minPeriod to DD
categoryAxis.dashLength = 2;
categoryAxis.gridAlpha = 0.15;
categoryAxis.axisColor = "#DADADA";
// first value axis (on the left)
var valueAxis1 = new AmCharts.ValueAxis();
valueAxis1.axisColor = "#FF6600";
valueAxis1.axisThickness = 2;
valueAxis1.gridAlpha = 0;
chart.addValueAxis(valueAxis1);
// second value axis (on the right)
var valueAxis2 = new AmCharts.ValueAxis();
valueAxis2.position = "right"; // this line makes the axis to appear on the right
valueAxis2.axisColor = "#FCD202";
valueAxis2.gridAlpha = 0;
valueAxis2.axisThickness = 2;
chart.addValueAxis(valueAxis2);
// GRAPHS
// first graph
var graph1 = new AmCharts.AmGraph();
graph1.valueAxis = valueAxis1; // we have to indicate which value axis should be used
graph1.title = "red line";
graph1.valueField = "visits";
graph1.bullet = "round";
graph1.hideBulletsCount = 30;
chart.addGraph(graph1);
// second graph
var graph2 = new AmCharts.AmGraph();
graph2.valueAxis = valueAxis2; // we have to indicate which value axis should be used
graph2.title = "yellow line";
graph2.valueField = "hits";
graph2.bullet = "square";
graph2.hideBulletsCount = 30;
chart.addGraph(graph2);
// CURSOR
var chartCursor = new AmCharts.ChartCursor();
chartCursor.cursorPosition = "mouse";
chart.addChartCursor(chartCursor);
// SCROLLBAR
var chartScrollbar = new AmCharts.ChartScrollbar();
chart.addChartScrollbar(chartScrollbar);
// LEGEND
var legend = new AmCharts.AmLegend();
legend.marginLeft = 110;
chart.addLegend(legend);
// WRITE
chart.write("chartdiv");
});
// this method is called when chart is first inited as we listen for "dataUpdated" event
function zoomChart() {
// different zoom methods can be used - zoomToIndexes, zoomToDates, zoomToCategoryValues
chart.zoomToIndexes(10, 20);
//chart.validateData();
//createChart();
}
</script>
<div id="outerDisplay"></div>
<iframe id="hiddenContent" width="200" height="200" style="position:absolute;visibility:hidden;" ></iframe>
<div id="chartdiv" style="width:600px; height:400px; background-color:#FFFFFF"></div>
</body>
</html>
Anyone has any idea on how to troubleshoot it to make it display on the first load instead of having to resize it?

Did you try calling chart.validateNow()? See Amcharts reference.
Chart will be redrawn, useful when a property changes.