Page 192 - Computational Statistics Handbook with MATLAB

Chapter 5: Exploratory Data Analysis 179

Structure 1
2

1.5
1

0.5
0
β *
−0.5
−1

−1.5
−2
−2.5
−2 −1.5 −1 −0.5 0 0.5 1 1.5
α *

F FI F F IG URE GU 5.4 RE RE RE 5.4 5 5 5 5
5.4
GU
II
U
5.4
G
Here we see the first structure that was found using PPEDA. This structure yields a value
of 2.67 for the chi-square projection pursuit index.
Structure 2
3
2
1

β * 0

−1

−2

−3
−2.5 −2 −1.5 −1 −0.5 0 0.5 1 1.5 2 2.5
α *

IG
F FI U URE G 5.4 RE 5.4 6 6
GU
5.4
F F II GU RE RE 5.4 6 6
Here is the second structure we found using PPEDA. This structure has a value of 0.572 for
the chi-square projection pursuit index.
© 2002 by Chapman & Hall/CRC