Bar Graph with sub-cats with D3.js

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Bar Graph with sub-cats with D3.js

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Last edited Jul 27, 2023

Created on Jul 27, 2023

This example shows a bar graph that groups sales data by Sub-Category, with each bar colored by its parent Category (Furniture, Office Supplies, Technology) using a D3 ordinal color scale. It loads a CSV of sample store orders and aggregates total sales per sub-category with `d3.csv`, `d3.sum`, and nested data arrays, then renders the chart as SVG rectangles with `d3.scaleBand`, `d3.scaleLinear`, and `d3.axisBottom`/`d3.axisLeft` for axes and labels. The code runs in a React-compatible plain HTML page using D3 v5.

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A bare minimum HTML page demonstrating use of CSS and JavaScript.

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