On the Bias/Variance tradeoff in Machine Learning

参考：https://codesachin.wordpress.com/2015/08/05/on-the-biasvariance-tradeoff-in-machine-learning/

之前一直没搞明白什么是bias，什么是variance，现在看看这篇博文。

当你的模型太简单，也就是你的train error太大的时候，你的bias就会比较大；当你的模型变得复杂时，bias变小，同时模型变得比较senstive，variance就会变大

但bias变化的幅度更大，所有整体看来，cross-validation仍然是下降的。当过了某个点后，情况逆转。

时间： 2024-12-12 08:06:00

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