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修正 fd-growth
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@@ -24,8 +24,8 @@ class treeNode:
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self.count = numOccur # 节点出现次数
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self.nodeLink = None # 不同项集的相同项通过nodeLink连接在一起
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# needs to be updated
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self.parent = parentNode # 节点的父节点
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self.children = {} # 存储儿子节点
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self.parent = parentNode # 指向父节点
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self.children = {} # 存储叶子节点
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```
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## FP-growth 原理
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