機械学習で精度が出ない時にやることまとめ ref: https://qiita.com/junichiro/items/7e2842c7afba2407c49b

file0.txt

err(h_\theta(x), y) = \left\{
\begin{array}{ll}
1 & (h_\theta(x) \geq 0.5, y = 0 \quad or \quad h_\theta(x) \lt 0.5, y = 1) \\
0 & (otherwise)
\end{array}
\right.

file1.txt

\begin{align}
&d = 1, \quad h_\theta(x) = \theta_0 + \theta_1x \\
&d = 2, \quad h_\theta(x) = \theta_0 + \theta_1x + \theta_2x^2 \\
&\vdots \\
&d = 10, \quad h_\theta(x) = \theta_0 + \theta_1x + \ldots + \theta_{ 10 }x^{ 10 }
\end{align}