Question

I need a javascript (HTML4/5) based library to draw a line chart that has irregular data (and one or more series).

Here is an example:

x-axis  = [1, 2, 3, 4, 5, 6, 7, 8]

series1 (y-axis) = [6, 10, null, 8, null, 7, 6, 4]

series2 (y-axis) = [null, 8, 8, null, 1, 3, 5, 4]

In this chart the nulls are not taken in consideration; are in some way “skipped” and the line goes directly into the next value. Of course i want to highlight the points to know if a point is or isn’t there at that x value.

There are some of this charts with irregular data based on time series (like this highcharts.com/demo/spline-irregular-time) but i need that defining my own (regular) x-axis.

What do you suggest?

Answer 1

Highcharts can accept irregular data without using times.

Basically, you take the example that you posted, and remove the type: 'datetime' option, and specify numbers instead of dates in the series.

I have posted an example here: http://jsfiddle.net/TRLhc/