Intro to d3 Tutorial Notes

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Intro to d3 Tutorial Notes

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Last edited Sep 16, 2017

Created on Sep 16, 2017

This example demonstrates D3.js v4 data binding and scale fundamentals. It shows how ordinal and linear scales transform data values, then uses a repeated render cycle to update SVG rectangles with different colors (green, gold, blue) as the dataset changes size over timed intervals. The code constructs an SVG canvas, applies margin-based grouping, and references axis groups, while also illustrating the enter-update-exit pattern. It uses `d3.scaleLinear`, `d3.scaleOrdinal`, and the `selectAll().data()` binding approach to manage dynamic visual updates.

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