Margin Convention

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Margin Convention

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Last edited Jan 5, 2022

Created on Jan 5, 2022

This example demonstrates the D3 margin convention by rendering a horizontal bar chart of the top 10 most populous countries in 2020, using UN population data loaded via `d3.csv`. The chart employs `d3.scaleBand` for country positioning and `d3.scaleLinear` for population values, with an SVG `<g>` element translated by the margin object to inset the visualization. React manages the state and lifecycle, fetching and filtering the data before mapping it to styled `<rect>` elements inside the SVG.

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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 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.

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