Circle-Packing II

Circle-Packing II

A circle-packing visualization displays the hierarchical structure of the Flare dataset, with each node represented as a circle whose size encodes a numeric value. The code uses D3 v4's `d3.pack` layout to compute circle positions and radii, and `d3.hierarchy` to process the CSV data. SVG elements are generated manually, with circle nodes, clip-paths for text labels that split on capital letters, and tooltips showing full paths and formatted values via `d3.format`.

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Circle-Packing

This example visualizes the hierarchical structure of the Flare dataset using circle packing. Each node is represented as a circle, with leaf nodes sized by their value and grouped by their parent categories. The visualization uses D3 v4’s `d3.stratify` to build a hierarchy from the CSV and `d3.pack` to compute the circular layout. SVG circles are colored with a sequential magma scale based on depth, and hovering highlights the ancestors of a node via a CSS class and the `d3.selectAll` method.

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Circle Packing

This example visualizes the Flare class hierarchy as an enclosure diagram, using nested circles to represent the structure and size of each node. The visualization uses a circle-packing layout, where each circle’s area is proportional to the numeric value of its corresponding data item, and parent circles enclose their children to reveal the hierarchy. The implementation relies on `d3.pack()` for layout, `d3.hierarchy()` for data aggregation, and renders the result as an SVG with styled circles and labels. The color scheme distinguishes leaf nodes as orange with full opacity, while non-leaf circles are blue and semi-transparent.

Bubble Chart

This bubble chart visualizes the Flare class hierarchy, packing hundreds of circles into a square space where each circle’s area encodes a numeric value. The D3 v4 code uses the `d3.pack()` layout, an ordinal color scheme (`d3.scaleOrdinal` with `schemeCategory20c`), and SVG rendering. Text labels, clipped to their circles, split class names across multiple lines. Data is loaded from a CSV file via `d3.csv()`.

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Zoomable Circle Packing

Nested circles represent the hierarchical structure of the Flare visualization toolkit, with each circle’s area proportional to the underlying data value. Clicking a circle smoothly zooms the view to focus on that subtree, while the background color shifts and labels fade in and out during the animated transition. The visualization uses D3 v4’s `d3.pack` layout, `d3.hierarchy`, and `d3.interpolateZoom` to calculate circle positions and drive the zoom animation, rendering the hierarchy as SVG circles and text elements. Data comes from the bundled `flare.json` file.

Bubble Chart

A bubble chart encodes hierarchical data as a packed circle layout, with each circle’s area proportional to a numeric value and color representing its top-level package. The visualization uses D3 v4’s `d3.pack` and `d3.hierarchy` to compute the layout, then renders SVG circles and clipped text labels. Data comes from the Flare class hierarchy stored in a CSV file. Hovering reveals the full class name and formatted value via SVG `<title>` elements.

Bubble Chart

This bubble chart visualizes the hierarchical Flare class structure, encoding each class as a circle whose area represents a numeric value. The graphic packs all leaves into a compact, non-overlapping layout, with colors distinguishing top-level package categories. The implementation uses D3 v4’s `d3.pack` layout on an SVG canvas, reading data from a CSV file via `d3.csv`. Each circle is drawn with an SVG `circle` element, and labels are added using `clipPath` and `tspan` elements to fit text within the bubble. The underlying data comes from the Flare visualization toolkit’s class hierarchy.

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