Pseudotime Radial Lineage Tree

Real single-cell sequencing captures a snapshot of thousands of cells frozen at different points along a developmental process — not a time-lapse. Pseudotime analysis reconstructs the missing time axis by connecting cells that are close together in expression space into a lineage graph and measuring distance along that graph. This simulator builds a synthetic branching population, computes its minimum-spanning-tree lineage graph, and instead of a spatial scatter draws it as a radial dendrogram — angle from pure tree topology, radius from pseudotime — so branch points and developmental depth read directly off the shape of the sunburst. Click any cell to re-root the tree and watch the whole diagram redraw around its new developmental origin.