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Laplace-smoothing

Published: Tue 28 April 2020

By svtter

拉普拉斯平滑，是一种用于处理0概率问题平滑方法。通过对每个分量+1来计算概率。例如，某个词语K，在不同类中的观测数量分别是0，10，20，概率为0， $\frac{1}{3}$ ， $\frac{2}{3}$ ，对这三个量进行laplace-smoothing后，结果应该是 $\frac{1}{30+3}$ , $\frac{11}{30+3}$ , $\frac{21}{30+3}$ 。

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