Highcharts adding labels/columns with no data - highcharts

Question

I'm having a problem with Highcharts drawing points that have no data attached to them. The chart is a column chart with drilldown, showing an average "time" per week on the top level, with a drilldown displaying the actual value per case for the selected week.
My problem is this: When I drill down into a certain week, cases that do not exist are still displayed on the chart if they exist between two existing case IDs.e.
Consider the data being passed for week 6: [[272, 25.07][297, 500.54]], only two cases exist: 272 and 297. However, Highcharts is giving me this:
https://i.stack.imgur.com/MpABB.png
This is the code for the chart itself:
Highcharts.chart('DrilldownChart', {
chart: {
type: 'column'
},
title: {
text: ''
},
subtitle: {
text: ''
},
xAxis: {
type: "",
labels: {
rotation: 90
},
},
yAxis: {
title: {
text: ''
}
},
exporting: {
enabled: false
},
credits: {
enabled: false
},
legend: {
enabled: false
},
plotOptions: {
column: {
minPointLength: 0
},
series: {
borderWidth: 0,
dataLabels: {
enabled: false,
format: '{point.y:.1f}',
rotation: 270
}
}
},
tooltip: {
pointFormat: '<span style="color:{#000}"></span>{point.y:.2f}<br/>'
},
series: MainDataArray,
drilldown: {
series: DrilldownDataArray,
}
});
Does anyone know how to stop it from drawing the labels/columns between points with actual data?
Thanks!

Answer 1

You just need to convert the x values from your array to String type, then they would be treated as a category name instead of category indexes. In order to convert it, you can use Array.map() function just like that:
var drilldownSeries = [{
id: 'One',
data: [[272, 25.07], [297, 500.54]].map(elem => {
return [elem[0].toString(), elem[1]]
})
}]
However, before that please make sure that your xAxis.type is set to 'category', because I noticed that in your code there is an empty string assigned to type field.
Here is the example which shows how to achieve described effect:
https://jsfiddle.net/8h03urrr/