Summary
In this paper we present Durcheinander, an interactive system designed to support learners in understanding agglomerative clustering (AG) processes. This datamining approach is mainly used to unveil structural relations in high-dimensional datasets. Durcheinander operates on a two-dimensional dataset comprising of the positions of 20 or more objects located on a tabletop surface. Changing the objects' location causes the system to compute an updated dendrogram that represents the actual dataset. If the dendrogram's configuration differs substantially from its predecessor, a spatial sound event that represents the internal structure is rendered in realtime and played back to the users by a multi-channel audio system surrounding the table. Replaying that configuration is possible by knocking onto the surface.
