I'd like to have the y-axis data labels return 'N/A' for null values. Currently nothing is displayed. I tried using the y-formatter function to say if the y value equaled null, return N/A but haven't had luck for some reason? I'm somewhat new to Highcharts, so please forgive the basic nature of the question.
formatter: function() {
if (this.y !== null)
return 'test';
var chart = this.series.chart;
chart.renderer.text('n/a', this.point.plotX - 10, chart.plotHeight - 10).add(this.series.group)
},
Here's the link to the JSFiddle: http://jsfiddle.net/v5vJR/