D3 DataBinding

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D3 DataBinding

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Last edited Aug 29, 2018

Created on Aug 29, 2018

This example demonstrates a basic scatterplot-style bar chart created with D3 v5, showing census data for Colombian municipalities loaded from a JSON file hosted on GitHub. The chart uses a linear scale (`d3.scaleLinear`) to map census values to horizontal bar widths, with rectangles appended to an SVG element via D3’s data join (`selectAll`, `.data`, `.enter`). Bars are sorted in descending order using `d3.descending` and rendered with a fixed height, while the dataset is fetched asynchronously with `d3.json`. The visualization emphasizes D3’s core data-binding pattern for simple, static SVG rendering.

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This example shows a simple bar chart built with D3 v5, displaying census data for municipalities from a JSON dataset. The visualization renders two SVG elements, though only the first is populated with data. The code uses `d3.scaleLinear` to map census values to bar widths and `d3.ascending`/`d3.descending` for sorting. It demonstrates data binding with `selectAll` and `enter().append()` to create rectangles and text labels, though the label positioning is incomplete. The data is loaded via `d3.json` from a GitHub-hosted source.

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