2）JOIN运算得到的。 剪枝步：由于是的超集，所以可能有些元素不是频繁的。在潜在k项集的某个子集不是中的成员是，则该潜在频繁项集不可能是频繁的可以从中移去。 通过单趟扫描数据库D，计算中各个项集的支持度，将中不满足支持度的项集去掉形成。-failed to translate

main.cpp
newstd.txt
CLASSIFY.txt

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