ENTROPYindex1D          ENTROPY PP index
GINIindex1D             GINI PP index
Huber.plot              Draw Huber plot for 2D data with various PP
                        index
LDAindex                LDA PPindex
LDAopt                  PP optimization using LDA index
Lrindex                 Lr PP index
PDAindex                PDA PP index
PDAopt                  PP optimization using PDA index
PP.Tree.class           Projection pursuit classification tree with
                        various PP indices
PP.classify             predict projection pursuit classification tree
PPclassNode.Viz         Visualization tools to explore each node of
                        PPtree
PPopt                   PP optimization using various PP indices
PPopt.Viz               Visualize PPopt result
plot.PPtreeclass        Plot projection pursuit classification tree
print.PPtreeclass       Print PP.Tree.class result
