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NICS Data - WIP Bar Chart version 2

✓ Published3🌍 Public
Rrpkupfer@wpi.edu
Last edited Sep 24, 2025
Created on Sep 24, 2025

This bar chart displays total firearm background checks by U.S. state for September 2023, with each bar stacked to show the breakdown between handguns, long guns, other firearms, and multiple-gun purchases. The chart aggregates monthly data from the NICS dataset, filtering out territories. Built with D3 v7 and d3-rosetta, it uses `scaleBand` and `scaleLinear` for axes, appends stacked rect elements per gun type, and includes a legend showing color-coded categories.

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MIT Licensed

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