Comments (2)
另外,one-hot特征可能存在大量0特征,使用整个的矩阵乘法会把0的部分也计算进去,是否用field index映射的方法更加高效呢?每个field所对应的特征直接取对应的w和隐向量进行计算
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目前已更新,感谢指出
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