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Bar Chart of BMW volume of sales with Hover

✓ Published1🌍 Public
BBismark Kofi Owusu Sarfo
Last edited Oct 28, 2025
Created on Oct 28, 2025

This bar chart displays BMW sales volumes by region for 2022, using the `Sales_Volume` field from `data.csv`, aggregated via `d3.rollups`. Each bar is colored by its corresponding country, and hovering over a bar highlights it in black while dimming others, showing a tooltip with the exact sales figure. The visualization uses D3.js v7's SVG rendering, with scales created via `d3.scaleLinear` and `d3.scaleBand`, and interactive hover events implemented through D3's `.on('mouseover')` and `.on('mouseout')` handlers.

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MIT Licensed

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