A tool for creating and visualising formal concept trees

This paper presents a tool for creating and visualising formal concept trees. The concept tree provides an alternative visualisation to the more commonly known concept lattice. The tool described here is an extension of the In-Close formal concept mining program, where concepts are output in a format that can be visualised in a Web Browser using the Collapsible Tree Layout from the D3.js JavaScript library. Because the visualisation is expandable and collapsible, the tool is able to deal with large trees and the user is able to explore branches with single mouse clicks and by panning and zooming the tree. So-called ‘iceberg trees’ can also be produced, by specifying a minimum support for objects.