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请问为什么需要对数据集分开做归一化，归一化通常不是应该对整个数据集做吗？ #12

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JokerDu opened this issue Sep 28, 2017 · 1 comment

JokerDu commented Sep 28, 2017

训练集的由于数据量比较多，在归一化时接近真实分布的均值和方差，但是测试集样本量比较少，这样计算的测试集的均值和方差肯定会有误差的。但是我对整体归一化的效果并没有分开归一化的效果好，能请教一下原因吗？

zewenli98 commented Nov 7, 2018

训练集的由于数据量比较多，在归一化时接近真实分布的均值和方差，但是测试集样本量比较少，这样计算的测试集的均值和方差肯定会有误差的。但是我对整体归一化的效果并没有分开归一化的效果好，能请教一下原因吗？

你好，我也有这个疑惑，请问你解决了吗？

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