131.007 Unsupervised Learning - Feature Selection | 非监督学习 - 特征选择

1 Why? Reason1 Knowledge Discovery (about human beings limitaitons) Reason2 Cause of Dimensionality (维度灾难) (about ML algorithm itself) 所需的数据量会根据你所拥有的特征数量以指数速度增长 2 NP-Hard Problem arbitrarily choose m
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