ec | tp | ky | ||
2004 | 1 | 0.9 | 0.972 | 0.817 |
2005 | 1 | 1.383 | 1.43 | 1.376 |
2006 | 1 | 1.18 | 0.629 | 1.069 |
2007 | 1 | 1.304 | 1.062 | 1.038 |
2008 | 1 | 1.039 | 0.978 | 0.999 |
2004 | 2 | 1.036 | 0.974 | 1.087 |
2005 | 2 | 0.985 | 0.948 | 0.703 |
2006 | 2 | 1.2 | 0.908 | 1.093 |
2007 | 2 | 1.076 | 1.035 | 1.037 |
2008 | 2 | 0.993 | 1.052 | 0.875 |
…… | 1.005 | 1.306 | 1.242 |
比如我有这样的面板数据?我如何标准化呢?


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