Making a Bar Chart with D3

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Making a Bar Chart with D3

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Last edited Feb 23, 2020

Created on Feb 23, 2020

This example shows a horizontal bar chart of population counts for the ten most populous countries, derived from a CSV file where values are normalized by dividing by 1000. The visualization uses D3 v5’s `scaleLinear`, `scaleBand`, `axisLeft`, and `axisBottom` to map population to bar width and country names to vertical bands, rendering SVG rectangles with a steelblue fill. Margins offset the chart within an SVG sized 960 by 500, with axes labeled using D3’s axis generators.

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Making a Bar Chart with D3

This example shows a horizontal bar chart of population figures for ten countries, ordered from largest to smallest. The visualization is built with D3 v5, using `d3.csv` to load the data, `scaleLinear` and `scaleBand` for the axes, and `axisLeft` and `axisBottom` to render tick marks. Population values are read as strings from the CSV and converted to numbers, then multiplied by 1000 before being mapped to bar widths. The SVG is styled with a steelblue fill for rectangles.

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