Add dragging feature
Dragging allows you to interactively modify a node position, updating other nodes automatically.
Here is the template I start with when needing to build a circular packing with one level of hierarchy. Input data is a
.csv file giving features for each node. Circle size an color depends on these features. You can drag circles to reorganize, and hover them for more information.
A selection of examples showing the application of the basic concept to real life dataset.