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Store constraining + zoomable pack circle

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CCalvin Gomez
Last edited May 19, 2020
Created on May 19, 2020

This zoomable circle packing visualization displays hierarchical data from altData.json using nested circles sized by leaf node values. The chart starts centered on the root node and animates through zoom transitions when clicking child circles, revealing deeper levels of the hierarchy. Built with D3 v5, the code uses `d3.pack`, `d3.hierarchy`, and `d3.interpolateZoom` to calculate layouts and smooth zooming, while transitions update circle radii and label visibility. The SVG rendering uses a color scale to distinguish depths, with click handlers enabling interactive navigation through the tree structure.

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