A Hybrid Model Using PCA and BP Neural Network for Time Series Prediction in Chinese Stock Market with TOPSIS Analysis

Table 4

Eigenvalues of the correlation matrix.

	Eigenvalues	Difference	Scale
1	5.9439	3.8223	0.5944
2	2.1217	1.1563	0.2122
3	0.9654	0.3121	0.0965
4	0.6532	0.4369	0.0653
5	0.2163	0.1501	0.0216
6	0.0666	0.0520	0.0066
7	0.0141	0.0029	0.0014
8	0.0112	0.0032	0.0011
9	0.0080	0.0080	0.0008
10	0.0000	0.0000	0.0000
11	0.0000	0.0000	0.0000