loon.tourr

A tour is a motion graphic designed to study the joint distribution of multivariate data (Asimov 1985). A sequence of low-dimensional projections is created by a high dimensional data set. Tours are thus used to find such interesting projections. Between each plane, interpolation along a geodesic path is provided so that the points in a 2D sub space can be rotated smoothly. Package tourr (Wickham et al. 2011) implements geodesic interpolation and basis tour generation functions. Unfortunately, this package is not maintained any more.

loon.tourr embeds the features of tourr in loon. The interesting projections can be accessed as the bar is scrolled. One can query the current projection matrix easily. In addition, random tour with higher than 2 dimensions is also provided with applying a parallel coordinate or a radial coordinate.