d3.js practice

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d3.js practice

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Last edited Jan 18, 2020

Created on Jan 18, 2020

A bar chart displays population estimates for ten countries, using horizontal bars ordered from China’s 1.4 billion down to Mexico’s 130 million. The visualization loads a CSV file via `d3.csv`, converts the population strings to numbers, and renders SVG rectangles with `d3.scaleLinear` for the x-axis and `d3.scaleBand` for the categorical y-axis. Data binding appends rects, while `bandWidth()` sets each bar’s height, with no axes or labels shown.

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This example presents a horizontal bar chart of population figures for ten countries, using data from a CSV file where values are scaled by ten thousand. The visualization ranks countries from China to Mexico by their population, with each bar’s length proportional to its value. Built with D3 v5, the code uses `d3.csv` for data loading, `scaleLinear` and `scaleBand` for positioning, and `axisLeft` and `axisBottom` to render axes. Bars are drawn as SVG rectangles with a steelblue fill, appended to a group translated by specified margins.

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