Research Article
Evaluation of Ecological Environment Quality in Chongqing Main City Area Based on Principal Component Analysis
Table 5
Standardization of raw data.
| Year | zx1 | zx2 | zx3 | zx4 | zx5 | zx6 | zx7 | zx8 | zx9 |
| 2009 | −0.339 | 1.407 | −0.771 | −0.865 | −2.579 | −1.028 | −1.17 | −0.645 | −1.143 | 2010 | −0.962 | 1.407 | −0.816 | −0.663 | −0.832 | −2.592 | −2.084 | −1.385 | −1.382 | 2011 | −0.861 | 0.749 | −0.732 | −0.793 | −0.333 | 0.184 | −0.696 | −1.196 | −0.545 | 2012 | 2.434 | 0.419 | −0.642 | −0.728 | 0.083 | 0.151 | 0.646 | −0.803 | −0.874 | 2013 | −0.993 | 0.09 | −0.612 | −0.727 | 0.067 | 0.712 | 0.726 | −0.677 | −0.844 | 2014 | 0.653 | 0.09 | −0.411 | −0.397 | 0.271 | 0.164 | 0.228 | −0.299 | 0.143 | 2015 | 0.515 | −0.24 | −0.313 | −0.335 | 0.279 | 0.066 | −0.632 | 0.85 | 0.203 | 2016 | 0.399 | −0.24 | −0.002 | 0.054 | 0.598 | 1.011 | −0.757 | 1.023 | 1.025 | 2017 | −0.647 | −0.569 | 0.777 | 1.087 | 0.679 | 0.516 | 0.776 | 1.023 | 1.13 | 2018 | −0.201 | −1.557 | 1.352 | 1.72 | 0.851 | 0.457 | 0.786 | 1.023 | 1.13 | 2019 | 0.004 | −1.557 | 2.172 | 1.647 | 0.916 | 0.36 | 0.786 | 1.086 | 1.16 |
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