8.1 Noise and Probabilistic Target
2017-08-12 15:58
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Recap The Learning Flow
Noise
Probabilistic Marbles
Target DistributionPyxPymathbfx
The New Learning Flow
Fun Time
如果资料有noise会发生什么?
noise有以下几种情况:
i.i.d.:independent and identically distributed 独立同分布。
P(y|x):代表在已经确定是x弹珠的情况下的两种颜色的概率。
VC Bound在有noise的情况下仍然有效。
deterministic target可以被看作target distribution的一种特殊情况。
学习的目标:在常见的点上要做的好(接近mini-target)。
Noise
Probabilistic Marbles
Target DistributionPyxPymathbfx
The New Learning Flow
Fun Time
Recap: The Learning Flow
如果资料有noise会发生什么?
Noise
在介绍pocket算法之前简单的介绍了noise。noise有以下几种情况:
Probabilistic Marbles
有noise时可以认为是有“会随时间变色”的弹珠,只要记录在取样时的颜色即可。整体的性质是不会变的,橘色的概率仍然是可以被预测的。i.i.d.:independent and identically distributed 独立同分布。
P(y|x):代表在已经确定是x弹珠的情况下的两种颜色的概率。
VC Bound在有noise的情况下仍然有效。
Target Distribution:P(y|x)
例子:一个点有70%的概率是圈,那么就认为它是圈(ideal mini-target),其30%是叉的概率被视为杂讯。deterministic target可以被看作target distribution的一种特殊情况。
学习的目标:在常见的点上要做的好(接近mini-target)。
The New Learning Flow
以上说明了pocket的可行性。Fun Time
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