Assignment_7_Q2

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Assignment_7_Q2

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Last edited Oct 27, 2025

Created on Oct 27, 2025

This pie chart visualizes total expenses aggregated by region from an inline CSV dataset containing monthly sales, profit, expenses, and region fields. The D3.js (v7) code uses `d3.rollup` and `d3.sum` to aggregate expenses per region, then renders SVG slices with `d3.pie` and `d3.arc`. Interactive tooltips appear on mouseover showing the exact expense value, while slice labels display percentage shares (hidden below 5%). A legend with color-coded rectangles identifies each region and its total expenses, using `d3.scaleOrdinal` with the `schemeTableau10` color scheme.

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MIT Licensed

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