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Margin Convention

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KKazushige Okuma
Last edited Oct 20, 2021
Created on Oct 20, 2021

This example demonstrates the margin convention in D3 by rendering a horizontal bar chart of the top ten countries by 2020 population from a UN dataset. The chart uses React state to load the CSV data via `d3.csv`, then maps it to SVG rectangles positioned with `d3.scaleBand` and `d3.scaleLinear`. The outer `<svg>` is sized to 960×500, while an inner `<g>` element is translated by margin offsets, showing how to reserve space for axes or labels. The visualization highlights reusable patterns for combining React with D3’s data utilities.

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A program that loads some data about CSS named colors using D3 utilities, and use React state to render the data as a radial burst

MIT Licensed

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Margin Convention

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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This example demonstrates D3’s margin convention by rendering a horizontal bar chart of UN population data for the top ten countries in 2020. The chart uses React state to load the CSV via `d3.csv` and maps each country to a `<rect>` inside a translated `<g>` element, with scales from `d3.scaleBand` and `d3.scaleLinear`. All marks are drawn as SVG within a fixed 960×500 viewport, clearly separating the plotting area from the surrounding margins.

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