How to make highcharts default to 0 for missing data

Question

I have a time series at a 1 minute interval. I would like to display that in a chart with missing points as 0.

I've found xAxis.ordinal and turned that off which displays the time series properly spaced out. The issue is that it draws lines between the points directly without going to 0 for the missing data.

Answer 1

One way is by pre-processing the data, replacing null with 0:

var withNulls = [null, 12, 23, 45, 3.44, null, 0]; var noNulls = withNulls.map(function (item) {     return (item === null) ? 0 : item; }); 

Example saved on jsfiddle: http://jsfiddle.net/7mhMP/

Answer 2

I've thorougly searched the API reference of HighCharts, but they don't offer that option. What they do offer is the option to disable the connection of points when null data is in between (only line and area charts):

var chart = new Highcharts.Chart({     plotOptions: {         line: {             connectNulls: false         }     } }); 

This is the default setting according to the API, so I'm not sure why your data does connect with null values in between. Maybe they have changed the defaults lately?

I feel this is a good representation of your data, because defaulting null to 0 seems misleading.