Unverified50% confidenceFactExact time
分层抽样按各类别在总体中的比例进行抽样，sklearn的StratifiedShuffleSplit在此基础上增加随机打乱与多次重采样能力，特别适合类别不平衡场景
1
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50%
Confidence
Long-term
Relevance
7/19/2026
First Seen
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