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The Margin Convention

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Ccynichole
Last edited Feb 18, 2022
Created on Feb 18, 2022
Forked from Bar Chart D3

This example demonstrates the margin convention in D3 by rendering a horizontal bar chart of the top 10 most populous countries using 2020 UN population data loaded via `d3.csv`. The chart uses `d3.scaleBand` and `d3.scaleLinear` to map country names and population values to SVG `rect` elements within a translated `<g>` group, with explicit margins separating the inner plot area from the SVG edges. React state and the `useEffect` hook manage asynchronous data loading, while the entire visualization is rendered as SVG inside a React component.

AI-generated description

A program that loads in some data using D3 utilities and uses React state to keep track of the data.

MIT Licensed

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The Margin Convention

This example demonstrates the margin convention in D3 by rendering a horizontal bar chart of the top 10 most populous countries from a UN population dataset. The chart uses a React component with D3 scales (`scaleBand`, `scaleLinear`) to position and size SVG rectangles within a translated group element, explicitly reserving space via a margin object. The x-axis encodes population in 2020, while the y-axis displays country names. The code applies D3's `csv` loading and React's `useState` and `useEffect` hooks for data fetching.

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