Evaluation of Ecological Environment Quality in Chongqing Main City Area Based on Principal Component Analysis

Table 8

Eigenvalue and contribution rate table of ecological environment indicators.

Composition	Eigenvalue	Contribution rate of variance	Cumulative contribution rate
N1	5.711	63.459	63.459
N2	1.255	13.945	77.404
N3	0.99	10.996	88.4
N4	0.631	7.017	95.417
N5	0.257	2.852	98.269
N6	0.075	0.832	99.102
N7	0.053	0.593	99.694
N8	0.021	0.228	99.922
N9	0.007	0.078	100