Updating basic column high chart - highcharts

Question

I am having a problem updating my basic column high chart.
My json array that is returned from the server is:
[{"name":"positive","data":[18,35,32,38]},{"name":"negative","data":[0,14,65,121]}]
I am only using the "data" arrays ^ i.e. jsonArr[0].data and jsonArr[1].data
I have the data set up correctly, however the chart is not depicting these values. Any ideas?
Here is my javascript:
$(document).ready(function() {
var twitterChart;
posArr = [];
negArr = [];
function renderGraph()
{
$.getJSON("FrontController", function(jsonArr, statusTxt, xhr){
console.log("Data returned : " + data);*/
posArr = jsonArr[0].data;
negArr = jsonArr[1].data;
console.log("posArr: " + posArr);
console.log("negArr: " + negArr);
twitterChart.series[0].data = posArr;
twitterChart.series[1].data = negArr;
});
setTimeout(renderGraph, 3000)
}
twitterChart = new Highcharts.Chart({
chart: {
renderTo: 'container1',
type: 'column'
},
title: {
text: ''
},
subtitle: {
text: ':'
},
xAxis: {
categories: [
'Column 1',
'Column 2',
'Column 3',
'Column 4'
]
},
yAxis: {
min: 0,
title: {
text: 'Testing"'
}
},
legend: {
layout: 'vertical',
backgroundColor: '#FFFFFF',
align: 'left',
verticalAlign: 'top',
x: 100,
y: 70,
floating: true,
shadow: true
},
tooltip: {
formatter: function() {
return ''+
this.x +': '+ this.y +' tweets';
}
},
plotOptions: {
column: {
pointPadding: 0.2,
borderWidth: 0
}
},
series: [{
name: 'Positive',
data: posArr
}, {
name: 'Negative',
data: negArr
}]
});
renderGraph();
});
</script>

Answer 1

To update series data use twitterChart.series[0].setData(array); see: http://api.highcharts.com/highcharts#Series.setData()