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Updates ml/clean-feature/outlier-detect.md
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shunliz committed Jan 22, 2018
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异常值检测
# 异常值检测


1极值分析

1极值分析
通过scatterplots,histogramas, box和whisker plot分析极值

通过scatterplots,histogramas, box和whisker plot分析极值
查看样本分布假设高斯分布),去距离1/4和3/4值2-3倍标准差数值的样本

查看样本分布假设高斯分布),去距离1/4和3/4值2-3倍标准差数值的样本
2临近方法

2临近方法
基于k-means分析样本质心去掉离质心特别远的样本

基于k-means分析样本质心去掉离质心特别远的样本

3投影方法
3投影方法

通过PCASOMsammon mapping去掉不重要特征

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