Table 1.

PCA label versus DVF estimation accuracy.

Number of PCA labels	information (%)	Increment of information (%)
1	71.08	71.02
2	87.37	16.35
3	97.22	9.85
4	98.24	1.02
5	99.20	0.96
6	99.62	0.42
7	99.89	0.27
8	100.00	0.11