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PRML exercise 1.8: To derive mean: change of variable z = x - u, use symmetry To derive variance: differentiate normaliation condition (integrate to 1 阅读全文
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转http://stackoverflow.com/questions/1962278/dealing-with-timestamps-in-rYou want the (standard)POSIXttype from base R that can be had in 'compact form... 阅读全文
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Si-Bao Chen, Chris Ding, Bin Luo and Ying Xie. Uncorrelated Lasso. AAAI, 2013.第一作者是安徽大学陈思宝副教授。第二作者 Chris Ding 是德克萨斯大学阿灵顿分校的教授,Google Scholar 上他引超过 157... 阅读全文