Machine Learning笔记(6)

Perception algorithm

online Learning: 边预测边学习参数
感知机: 假设 $h:X\mapsto y \in \{-1,1\}$
$h_{\theta}(x) = g(\theta^T x)$
$g(z) = \begin{cases} 1 & z \ge 0 \\ -1 & z \lt 0 \end{cases}$
感知机学习算法:
$\theta = \begin{cases} \theta & if \; h_{\theta}(x^i) = y^i \\ \theta + y^i x^i & otherwise \end{cases}$
证明？？

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