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Making a Bar Chart

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DDaniel Hug
Last edited Oct 15, 2020
Created on Oct 15, 2020

A bar chart displays population data for five countries using horizontal bars. The example builds the chart through D3.js version 5, using `d3.csv` to load the data, `d3.scaleLinear` for the x-axis, and `d3.scaleBand` with padding for the y-axis categories. Rectangles are appended to an SVG element, with bar widths proportional to each country's population. The code marks a basic introduction to D3's data-binding and scale functions.

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Demonstrates fundamental DOM manipulation using D3.js by making a smiley face whose eyebrows move.

MIT Licensed

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Making a Bar Chart

This example demonstrates how to build a simple, horizontal bar chart using D3 v5 and SVG. It displays population data for ten countries, with bars sized proportionally to each nation’s population in thousands. The code uses `d3.csv` to load the data, then applies `scaleLinear` for the x-axis and `scaleBand` for the y-axis to position and size the rectangles. The chart is rendered entirely with SVG `<rect>` elements, with the population values converted to numbers before scaling.

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