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贝叶斯分类器的应用
http://www.ruanyifeng.com/blog/2013/12/naive_bayes_classifier.html
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https://zh.wikipedia.org/zh-hans/%E6%9C%B4%E7%B4%A0%E8%B4%9D%E5%8F%B6%E6%96%AF%E5%88%86%E7%B1%BB%E5%99%A8
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http://www.ruanyifeng.com/blog/2013/03/tf-idf.html
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边缘概率就是把某一维度积分掉,就会在边上出现一行概率,就叫边缘概率,还挺形象的
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除了起始的根节点,其他每个点都是条件概率表
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https://www.youtube.com/watch?v=8nKyZWoB7p0
C是给定的 可以观测的 tail-to-tail 的ab时候条件独立的
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原来测一下 协方差的值是用来测线性独立度的,线性独立就意味着不能用X=AY+b来表示。
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以上都是只有两个,如果有n个,就是下面的 矩阵
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