VISUALIZING THE EVOLUTION OF SOFTWARE SYSTEMS USING THE FOREST METAPHOR - Information Visualisation: Techniques, Usability and Evaluation - page 137

Fig. 7.6. Three evolving classes for the systems JFreeChart, JEdit, and JHotDraw.
Fig. 7.6 shows the trees of three sample classes for the systems
considered in the case study (i.e., the main classes for JFreeChart and
JEdit, respectively, and the class for JSheet). The trees of two subsequent
releases of these classes are shown as well. As far as the JFreeChart class
is concerned, we note that passing from the release 0.5.6 to the 0.7.0 the
foliage is different. In particular, the number of leaves is larger in the last
release and the colour of these leaves is greener. This indicates that the
number of attributes has increased. Moreover, the class in the last release