Develop Reference

HighCharts with Dynamic Data not working

I have a ASP.NET MVC project with SignalR.
I have a page with a HighChart and the script looks like this:
$(function () {
window.Highcharts.setOptions({
global: {
useUTC: false
}
});
var chart;
$(document).ready(function () {
chart = new Highcharts.Chart({
chart: {
renderTo: 'container',
type: 'line',
marginRight: 10
},
title: {
text: 'GMAS Queues'
},
xAxis: {
type: 'datetime',
tickInterval: 500,
labels: {
enabled: false
}
},
yAxis: {
title: {
text: 'Queue Count'
},
plotLines: [{
value: 0,
width: 1,
color: '#808080'
}]
},
legend: {
enabled: false
},
exporting: {
enabled: false
},
series: [{
name: 'Processing Queues'
}]
});
});
$.connection.hub.logging = true;
// Reference the auto-generated proxy for the hub.
var chartData = $.connection.processingQueuesHub;
// Create a function that the hub can call back to display messages.
chartData.client.updateQueueCounts = function (data) {
//$.each(data, function(i, item) {
// // Add the message to the page.
// $('#chartDataLog').append('<li><strong>' + htmlEncode(item.QueueName)
// + '</strong>: ' + htmlEncode(item.Length) + '</li>');
//});
// set up the updating of the chart.
var series = chart.series[0];
$.each(data, function (i, item) {
if (item.QueueName == "Queue A") {
var x = Date.parse(item.Date),
y = item.Length;
series.addPoint([x, y], true, false);
}
});
};
However, I see the graph but not the points.
The strange part is the series data points are there:
Anyone know why HighCharts is not rendering the points?
Thanks, Bill N

I have to thank my good friend and co developer for figuring this out. He is a smarter and braver man than me. :) He went to the highcharts source and found that the highcharts breaks if you add to the graph series before the initial animation is completed. The animation is why the clip-rect is zero-width (it animates from zero to full width over 1s when you first create the chart). You end up adding a point to the series before this animation even really starts. This kills the animation but it doesn’t fix the width of the clip-rect. The fix is to add animation is false for the series.
series: [{ name: 'Processing Queues', data: [], animation: false }]

It looks like you are not defining what your chart.series is until it is created. The line in your ajax is as follows and its not waiting for DOM ready:
var series = chart.series[0];
But you do not define chart until $(document).ready(function () {.... Try keeping your chart object in scope of your ajax.

HighCharts - dynamic graph & no tick mark on the right hand side dual axis

I'm new to high charts.
I'm dynamically making 2 ajax calls(inside getData() Function) and plotting the high chart with 2 series(with 2 y axis).
each ajax call with return the json data.
1st json data (sample)
[{"dt":"May 15, 2000","index":"2,007.030850"},{"dt":"May 16, 2000","index":"2,025.956108"}]
2nd json data (sample)
[{"dt":"May 15, 2000","nav":"145.236000"},{"dt":"May 16, 2000","nav":"146.602974"}]
I'm creating two series with 2 ajax calls. in the 2nd ajax call, i'm dynamically adding a y-axis for the 2nd series data.
$(document).ready(function() {
function getData() {
var chart = Highcharts.charts[0];
/* 1st Ajax Call to get the json data to plot the first series */
$.ajax({
type: 'POST',
dataType: 'json',
url: '/Six/TSServlet?file=ivv-sixIshareFundsHistoryIndex.json',
data: '',
async: false,
success: function(data) {
var categories1 = [];
var seriesData1 = [];
var yaxis;
$.each(data, function(i, e) {
categories1.push(e.dt);
/* below step to remove , is not important, done for my program */
yaxis = parseFloat(e.index.replace(/,/g, ''));
seriesData1.push(yaxis);
})
// add x-axis catagories
chart.xAxis[0].update({
categories: categories1,
tickInterval: 150
}, true);
// add the 1st series
chart.series[0].setData(seriesData1);
}
});
/* 2nd Ajax Call to get the json data to plot the second series */
$.ajax({
type: 'POST',
dataType: 'json',
url: '/Six/TSServlet?file=ivv-sixIshareFundsHistoryNav.json',
data: '',
async: false,
success: function(data) {
var categories2 = [];
var seriesData2 = [];
var yaxis;
$.each(data, function(i, e) {
categories2.push(e.dt);
/* below step to remove , is not important, done for my program */
yaxis = parseFloat(e.nav.replace(/,/g, ''));
seriesData2.push(yaxis);
})
/* This is the problem area, dynamically adding a dual y axis for the 2nd series */
chart.addAxis({ // Secondary yAxis
id: 'NAV-Series-Axis',
title: {
text: 'NAV Series'
},
lineWidth: 2,
lineColor: '#08F',
opposite: true
});
// add the 2nd series
chart.addSeries({name: "NAV Series",yAxis: 'NAV-Series-Axis',data: seriesData2});
}
});
} //getdata function ends here .............
Highcharts.setOptions({
global: {
useUTC: false
}
});
var chart;
$('#container').highcharts({
chart: {
type: 'spline',
animation: Highcharts.svg, // don't animate in old IE
marginRight: 10,
renderTo: 'container',
events: {
load: function() {
var series = this.series[0];
getData();
}
}
},
title: {
text: 'Six Share Funds History'
},
labels: {
formatter: function() {
return this.value + ' %';
}
},
xAxis: {
tickLength: 10
},
tooltip: {
formatter: function() {
return '<b>' + this.series.name + '</b><br/>' + this.x + '<br/>' + Highcharts.numberFormat(this.y, 2);
}
},
legend: {
enabled: false
},
exporting: {
enabled: false
},
series: [{
"Name": []
}]
});
});
});
My issue is i'm getting 2 axis for 2 series graph, but no tick marks on the right hand side y-axis. how to solve this issue? ideally i should see 100(one tick mark), 200 (one tick mark) etc on the right hand side blue bar(just like left hand side y-axis has 500,1000 etc)
Please see the screen shot, i dont see the tick marks on the right hand side blue bar (for the 2nd series graph)
Edited to add jsp:
<div id='TimeSeriesId'>
<div id="container" style="width: 100%; height: 600px;"></div>
</div>

You can add several Y-axes simply by making yAxis an array with more than 1 element. Each can have all of the usual axis attributes (see highcharts API).
yAxis: [{ // Primary yAxis
labels: { ...
},
title: { ...
},
opposite: true
}, { // Secondary yAxis
title: { ...
},
labels: { ...
}
}, { // Tertiary yAxis
title: { ...
},
labels: { ...
},
opposite: true
}],
...
To dynamically add them, use chart.yAxis = new Array(); chart.yAxis[1].title = ... etc.

highcharts spline with multiple series update every few seconds

I am trying to get a spline chart with 2 series that updates every few seconds. I have spent lots of time searching through various examples and I can get many different things to work but NOT this. I just cant seem to find an example that is exactly what I am trying to do out there.
I have the following json that is returned via ajax:
[{"name":"Test1","data":[[1415567095000,2117]]},{"name":"Test2","data":[[1415567095000,2414]]}]
Below is what I have for the chart definition. This is a slightly modified example that I found but I just cant figure out how to get this to work. I know that it should not be that complex and since I am new to javascript, I suspect it will be something simple that I just don't see. I know that I need to define multiple series and then perform addPoint with a shift but I cant seem to get it to work.
<script type="text/javascript">
$(document).ready(function() {
var options = {
chart: {
renderTo: 'container',
type: 'spline',
},
title: {
text: 'Dynamic RPS'
},
subtitle: {
text: 'US East'
},
xAxis: {
type: 'datetime',
},
yAxis: {
min: 0,
title: {
text: 'RPS '
}
},
plotOptions: {
column: {
pointPadding: 0.2,
borderWidth: 0
}
},
series: [{}]
};
setInterval(function() {
$.getJSON('test.php', function(data) {
options.series = data;
var chart = new Highcharts.Chart(options);
});
}, 20000);
});
</script>
Any help is greatly appreciated !!

Assuming your test.php will return a single new point on each call, I'd code it like this:
var chart = null;
function callAjax(){
$.getJSON('test.php', function(data) {
if (chart === null){ // first call, create the chart
options.series = data;
chart = new Highcharts.Chart(options);
} else {
var seriesOneNewPoint = data[0].data[0]; // subsequent calls, just get the point and add it
var seriesTwoNewPoint = data[1].data[0];
chart.series[0].addPoint(seriesOneNewPoint, false, false); // first false is don't redraw until both series are updated
chart.series[1].addPoint(seriesTwoNewPoint, true, false); // second false is don't shift
}
setTimeout(callAjax, 20000); // queue up next ajax call
});
}
callAjax();
Here's an example. Note, it just draws the same point over and over again.

How to format Highcharts columnRange to get json data for temperature Min and Max

I'm trying to display information on Highcharts from the forecast.io api. With the help of others on this site, I have figured out how to call the data using a simple line or area chart; however, I can't figure out how to with the columnRange chart. I want to display the daily min and max temperature forecast. So the top column would display today's min and max temp, and the next column would be tomorrows, and so on.
To call the min and max for today from forecast.io:
data.daily.data[0].temperatureMin
data.daily.data[0].temperatureMax
Tomorrows would have a "1" instead of a 0. The day after would have a "2".
I haven't been able to figure out how to make a function that does this for each day. I have a jsfiddile which includes my forecast.io API key. This is needed to call from the source.
Anyways, any help would be much appreciated! http://jsfiddle.net/nn51895/gjw9m1qo/2/
(my x axis labels are really messed up as you will see..)
$(function () {
$('#container').highcharts({
chart: {
type: 'columnrange',
inverted: true
},
title: {
text: ''
},
subtitle: {
text: ''
},
xAxis: {
},
yAxis: {
title: {
text: ''
}
},
tooltip: {
valueSuffix: '°F'
},
plotOptions: {
columnrange: {
dataLabels: {
enabled: true,
formatter: function () {
return this.y + '°F';
}
}
}
},
legend: {
enabled: false
},
series: [{
name: 'Daily Min and Max',
data: 'ChartData',
pointStart: new Date().getTime(),
pointInterval:90000000,
}]
});
});
$.ajax({
url: "https://api.forecast.io/forecast/87a7dd82a91b0b765d2576872f2a3826/53.479324,-2.248485",
jsonp: "callback",
dataType: "jsonp",
success: function(chart) {
var dataArr = new Array();
var height = chart.xAxis[0].height;
var pointRange = chart.daily.data[0].temperatureMax - chart.daily.data[0].temperatureMin;
var max = chart.daily.data[0].temperatureMax;
var min = chart.daily.data[0].temperatureMin;
var pointCount = (max - min) / pointRange;
var timeint = chart.daily.data[0].time;
for(var i=0; i<chart.daily.data.length; i++)
dataArr.push(chart.daily.data[i].temperatureMin);
plotChart(dataArr, timeint)
}
});

First of all, as said in the comment:
success: function (chart) {
...
var height = chart.xAxis[0].height;
}
You are trying to get for some unknown reason height of xAxis from the chart. Meanwhile you chart variable is referring to the data from AJAX call. I hope that's clear, so remove that line or change to:
success: function (chart) {
var myChart = $('#container').highcharts();
var dataArr = new Array();
var height = myChart.xAxis[0].height;
}
Second thing, that option:
data: 'ChartData',
Is wrong, there should be an empty array, since Highcharts requires array for data, not some string:
data: [],
Now, after fixing these bugs, you should go to this demo and create the same data format. That's example for required format for Highcharts.
More about series.data can be found in API reference - you need to read this.

Displaying a json file with highstock

I have some difficulties displaying a graph with Highstock. It seems like I can't have access to the x-axis part where the graph should be displayed. I am new with Highstocks so my code could seem like a mess but my idea was the following:
First access the json file from the server. Convert it in the right format [[datestamp, value], ....]. Then display the graph.
Here is my Json file (file.json):
[{"date":"2013-10-04T22:31:12.000Z","value":30000},{"date":"2013-10-04T22:31:58.000Z","value":35000},{"date":"2013-10-04T22:32:05.000Z","value":60000},{"date":"2013-10-04T22:32:12.000Z","value":45000}]
My code is the following:
$(function() {
chartOjb = new Object();
var mydata = [];
$.getJSON('file.json', function(data) {
$.each(data, function (index, item) {
chartOjb.name = getTimestamp(item.date);
chartOjb.data = item.value;
mydata.push({ x: chartOjb.name, y: parseFloat(chartOjb.data) });
});
$('#container').highcharts('StockChart', {
chart: {
type: 'candlestick',
zoomType: 'x'
},
navigator: {
adaptToUpdatedData: false,
series: {
data: mydata
}
},
scrollbar: {
liveRedraw: false
},
xAxis: {
type: 'datetime',
title: 'Time',
//minRange: 3600 * 1000/15 // one hour
},
rangeSelector : {
selected : 1
},
title : {
text : value
},
series : [{
name : 'Capacité',
data : data,
tooltip: {
valueDecimals: 2
}
}] }); });
});
Thank you very much for your help

Could you add your function getTimestamp()? Maybe there is something wrong.
Keep in mind that:
x-value should be timestamp,
when using a lot of objects { x: x, y: y }, set turboThreshold