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Marks and Channels

✓ Published0🌍 Public
Mmelissastrong89@gmail.com
Last edited Mar 15, 2025
Created on Mar 15, 2025
Forked from Marks and Channels

This visualization demonstrates the concept of marks and channels in data visualization, showcasing how different visual encodings represent the same dataset. Using D3 version 7.8.5, six separate SVG panels each apply a distinct channel—X position, Y position, size, length, shape, and hue (color)—to encode the data points [0, 1, 2, 3, 4]. The code leverages D3’s `selection.each()` to iterate through these channel modules, `d3.symbol()` for path generation, and `schemeCategory10` from D3 for color mapping. It also utilizes SVG rectangles, circles, and path elements with `transform` and `fill` attributes.

AI-generated description

A demonstration of basic D3 usage to implement the concept of Marks and Channels. Includes usage of:

  • Point Marks by X, Y, Size
  • Line mark varying in length
  • Scaling factors
  • SVG Rectangles
  • selection.each()
  • SVG Path Elements
  • d3.symbol()
  • SVG attributes transform and fill
  • D3 Color Schemes
  • JavaScript Modules

Part of the Constructing Visualizations Playlist.

See also blocks.roadtolarissa.com: Marks and Channels (a vanilla JavaScript version of this).

MIT Licensed

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