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The Margin Convention

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Jjiro2017
Last edited Sep 20, 2021
Created on Sep 19, 2021

This example demonstrates the “margin convention” for D3 visualizations by rendering a horizontal bar chart of population data for ten countries in 2020. A React component uses the `useState` and `useEffect` hooks to load CSV data via `d3.csv`, then computes scales with `scaleBand` and `scaleLinear`. The SVG output positions all bars within a translated `<g>` element based on specified margin values, with `d3.max` determining the x-domain. The chart updates from a loading state to display the final encoded bars.

AI-generated description

A program that loads in some data data about CSS named colors with D3 utilities, and uses React to render the data as a radial burst.

MIT Licensed

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The Margin Convention

This example demonstrates the common “margin convention” in D3, where a chart’s inner plotting area is offset from the SVG edges by specified margins. It renders a horizontal bar chart of population data for the top ten countries from a CSV file, using `d3.csv` to load and parse the data, `scaleBand` and `scaleLinear` to map country names and population values to pixel positions, and React to generate the SVG rects. The visualization uses React’s `useState` and `useEffect` hooks to fetch the data asynchronously and update the display.

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