Highcharts failing to connect the dots with lines between data points

UPDATE: After some investigation, it turns out that the issue stemmed from inconsistent intervals. By following the solution outlined in this post, the problem was easily resolved.

I have implemented highcharts to create a chart, where the initial data points are defined within the highcharts code, and the subsequent points are fetched using ajax.

The initial points display correctly, and the first few retrieved points also appear as expected. However, after every few minutes, the connection between the points on the graph gets disrupted, then corrects itself before repeating the error.

Can anyone suggest what might be causing this issue?

javascriptajaxhighcharts

Answer №1

Encountered a similar issue myself. I found that the presence of empty strings ("" as opposed to zeroes) caused some connectivity problems. Transforming these values into null miraculously resolved the issue for me.

Answer №2

To ensure your data has the proper format, make sure to replace any empty strings with null values. Additionally, be sure to activate the connectNulls feature in the plotOptions section of your code like this:

plotOptions: {
    series: {
        connectNulls: true
    }
}

For a detailed example, you can refer to this JS FIDDLE

Answer №3

Encountering a comparable problem, I observed that certain so-called 'empty' values were actually stored as undefined, while others were represented as null. I made the decision to convert everything to null, which ultimately resolved the issue.

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