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- UID
- 223252
- 帖子
- 250
- 主题
- 133
- 注册时间
- 2011-7-11
- 最后登录
- 2013-8-22
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well using 2nd data, and 2nd stat I can calculate std dev of A, std dev ov B, and correlation coefficient within 30 seconds.
Given all that, you can compute covariance in another 20 sec with corr = covAB / sigA * sigB |
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发表于 2011-7-11 18:23
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