Lightning-Chart / lcjs-example-0053-dataGaps

Example showcasing how data gaps can be handled XY series. Particularly highlights line and area series in a trading use case

JavaScript Data Gaps Trading Chart

This demo application belongs to the set of examples for LightningChart JS, data visualization library for JavaScript.

LightningChart JS is entirely GPU accelerated and performance optimized charting library for presenting massive amounts of data. It offers an easy way of creating sophisticated and interactive charts and adding them to your website or web application.

The demo can be used as an example or a seed project. Local execution requires the following steps:

• Make sure that relevant version of Node.js is installed

• Open the project folder in a terminal:

    npm install              # fetches dependencies
    npm start                # builds an application and starts the development server
  

• The application is available at http://localhost:8080 in your browser, webpack-dev-server provides hot reload functionality.

Description

Normally, series types such as LineSeries, AreaSeries, etc. automatically connect data points to highlight the progression of trend values. In some specific use cases, this is not the ideal behavior as data may contain frequent data gaps, meaning relatively large time intervals when there are no data samples available.

In LightningChart JS, data gaps can be specified by adding an extra data point with value of NaN (Not-A-Number).

The code of this example shows one way of automatically detecting gaps in data sets and adding the NaN data points in. By default it looks for 1 hour difference between two data points, but this can be easily modified.

API Links

• Lightning chart
• Chart XY
• Axis
• Dashboard
• Line series
• Area series
• Axis tick strategies
• Zoom band chart

Support

If you notice an error in the example code, please open an issue on GitHub repository of the entire example.

Official API documentation can be found on LightningChart website.

If the docs and other materials do not solve your problem as well as implementation help is needed, ask on StackOverflow (tagged lightningchart).

If you think you found a bug in the LightningChart JavaScript library, please contact [e-mail].

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