Sequences sunburst
This sunburst chart visualizes sequences of user actions on a website, showing the hierarchical distribution of navigation paths and their frequencies. Hovering over a segment reveals its percentage share of the total and displays the action sequence as a breadcrumb trail above the chart. The visualization uses D3 v4’s `d3.partition`, `d3.arc`, and `d3.hierarchy` to compute and render the radial layout, with data loaded from a CSV file. Mouseover interactions fade non-ancestor segments and update the breadcrumb trail, while a legend toggles visibility.