Again, it is clear that these features are very useful, even by themselves and without x, y, and z positional histograms. This is good, since the two sources of information are distinct. It also indicates the potential sources of information finger position and wrist roll represent, and show that they can significantly help in deciding signs. In fact, these attributes are significantly better than the x, y and z histograms.
A consistent pattern is appearing here, however. As previously noted C4.5 is starting to ``lag behind'' the IBL's.