How to get multiple data series into Highcharts - json

Question

The following code works:
var options1 = {
chart: {
renderTo: 'container1'
},
series: [{}]
};
$.getJSON('tokyo.jsn', function(data){
options1.series[0].data = data;
var chart = new Highcharts.Chart(options1);
});
I want to be able to add a number of data series, so I am trying to take the reference to ‘new Highcharts’ out of the getJSON, but I don't seem to get it right. This following code does not work:
$.getJSON('tokyo.jsn', function(data){
options1.series[0].data = data;
});
var chart = new Highcharts.Chart(options1);
I have also tried tackling it a different way but again the following code does not work:
var chart1 = new Highcharts.Chart({
chart: {
renderTo: 'container1'
},
series: [{}]
});
$.getJSON('tokyo.jsn', function(data){
chart1.series[0].data = data;
});
Can anyone point me in the correct direction. I need to be able to support multiple data series by doing a second getJSON call like the following:
$.getJSON('sydney.jsn', function(data){
options1.series[1].data = data;
});
The JSON code I'm using is as follows:
[ 7.0, 6.9, 9.5, 14.5, 18.2, 21.5, 25.2, 26.5, 23.3, 18.3, 13.9, 9.6 ]
Thanks

Answer 1

$.getJSON is an asynchronous request. Once you receive the data, then you can pass it to Highcharts, thus you have to call that code from within the callback function of $.getJSON().
Try this, use a helper function to process your data and draw the chart, see drawChart() below:
var options1 = {
chart: {
renderTo: 'container1'
},
series: []
};
var drawChart = function(data, name) {
// 'series' is an array of objects with keys:
// - 'name' (string)
// - 'data' (array)
var newSeriesData = {
name: name,
data: data
};
// Add the new data to the series array
options1.series.push(newSeriesData);
// If you want to remove old series data, you can do that here too
// Render the chart
var chart = new Highcharts.Chart(options1);
};
$.getJSON('tokyo.jsn', function(data){
drawChart(data, 'Tokyo');
});
$.getJSON('sydney.jsn', function(data){
drawChart(data, 'Sydney');
});
See fiddle: http://jsfiddle.net/amyamy86/pUM7s/

Answer 2

You can use solution used by Highcharts in that example: http://www.highcharts.com/stock/demo/compare
Or first create empty chart, without any series, and then use addSeries() function in each callback, see: http://api.highcharts.com/highcharts#Chart.addSeries()