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it's fast. but not fast enough to beat 'pythonic for loop' #2

@HKHKHKHKHK

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@HKHKHKHKHK

你好,作者.终于看到用numpy实现决策树的例子,激动不已.
但是我试了一下决策树最原始版本的实现, 只用python本身,不用其他库, 发觉速度比这个numpy还快了几倍, 不知道上为什么. 照理numpy已经很快了呢.

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