1_Fork of Clustered Bar Chart - Credit Card Utilization by Attrition Status
This interactive clustered bar chart visualizes credit card utilization from the Bank Customers Dataset, comparing average transaction amounts, credit limits, or revolving balances across demographics such as income, education, and marital status. Bars are color-coded by customer attrition status (Existing vs. Attrited), with tooltips revealing aggregate sums and counts. Users select grouping and aggregate columns via dropdown menus, triggering transitions that update the chart. Built with D3 v7, it uses `scaleBand`, `scaleLinear`, `scaleOrdinal`, `rollups`, and `group` to compute summaries, rendered as SVG with animated bar transitions and hover highlighting.