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May 24, 2017 Replied to a topic by guolingbing › Python › 求解答，还是 numpy 和 pandas |
@amoia50 这个根本不会 work
May 24, 2017 Replied to a topic by guolingbing › Python › 求解答，还是 numpy 和 pandas |
@zhusimaji 这个 work ,但是速度比较慢，还要解决 na 值
May 22, 2017 Replied to a topic by guolingbing › Python › 求解答，还是 numpy 和 pandas |
谢谢各位，我已经找到方法了 233：
把数组 flat 以后，用 np.add.reduceat()方法
把数组 flat 以后，用 np.add.reduceat()方法
May 22, 2017 Replied to a topic by guolingbing › Python › 求解答，还是 numpy 和 pandas |
@imn1 这样太慢了
May 22, 2017 Replied to a topic by guolingbing › Python › 问一个 numpy pandas 相关的问题 |
@khowarizmi 实际上 np.in1d 我用起来很快的，要比遍历快的多，我现在用答案上提供的 in2d 的方法，大概两个 50W 的向量几秒就完成了,我估计是 numpy 和 pandas 会自动 hash
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