Polar Microphone Sensitivity JavaScript 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

This example showcases a simple Polar Chart with five Line Series.

Polar Charts are used for visualizing data relationships in terms of radiuses and angles.

Polar coordinate system and PolarLineSeries

{
    // Data point angle as degrees [0, 360].
    angle: 0,
    // Data point position on the *Amplitude Axis*. Determines its location between the Charts origin and outer edge.
    amplitude: 50
}

PolarLineSeries connects a list of such PolarPoints with a continuous line.

PolarRadialAxis

The coordinate system can be rotated with methods of *PolarRadialAxis**.

// Configure Polar Radial Axis.
const radialAxis = polar
    .getRadialAxis()
    // 0 = North
    .setRotation(90)
    // Clockwise direction.
    .setInverted(true)

PolarAmplitudeAxis

Similarly, the visible range of amplitude values can be configured with methods of PolarAmplitudeAxis. The default configuration is to fit

const amplitudeAxis = polar
    .getAmplitudeAxis()
    // Set amplitude interval explicitly.
    // [-39 dB, 0 dB]
    .setInterval({ start: -39, end: 0, stopAxisAfter: false })
    .setTitle('Sensitivity (dB)')

API Links

• Polar chart
• Polar line series
• Polar radial axis
• Polar amplitude axis
• Polar point

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 sales@lightningchart.com.

Direct developer email support can be purchased through a Support Plan or by contacting sales@lightningchart.com.

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