Marks and Channels

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Marks and Channels

✓ Published30🌍 Public

Last edited Jul 7, 2025

Created on Jan 29, 2023

This visualization demonstrates the concept of marks and channels, showing how position (x and y), size, length, shape, and hue encode data in separate SVG panels. Each panel uses D3 joins to bind the array [0, 1, 2, 3, 4] to circle, rect, and path elements, with attributes like `cx`, `cy`, `r`, `height`, and `fill` set via scale-like functions. The code imports from the `d3` module, using `schemeCategory10` for color, `symbol()` and `symbolsFill` for shapes, and `selection.each()` to dispatch each mark function.

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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