技術標籤：Letexletex

以下面的公式為例：

其Letex原始碼為:

J^{T} \cdot v = 
\left(\begin{array}{ccc} 
\frac{\partial y_{1}}{\partial x_{1}} & \cdots & \frac{\partial y_{m}}{\partial x_{1}}\\ 
\vdots & \ddots & \vdots\\ 
\frac{\partial y_{1}}{\partial x_{n}} & \cdots & \frac{\partial y_{m}}{\partial x_{n}} \end{array}\right)

\left(\begin{array}{c} \frac{\partial l}{\partial y_{1}}\\ 
                       \vdots\\ 
                       \frac{\partial l}{\partial y_{m}} 
      \end{array}\right) = 

\left(\begin{array}{c} \frac{\partial l}{\partial x_{1}}\\ 
                \vdots\\ 
                \frac{\partial l}{\partial x_{n}} 
                \end{array}\right)
 

指數：^{值}

一個點：\cdot

左括號：\left(

右括號：\right)

陣列左邊：\begin{array}{幾個c}

陣列右邊：\end{array}

{ccc}表示多少列，3個c表示3列

分數：\frac{分子}{分母}

偏微分號：\partial

水平三個點：\cdots

豎直三個點：\vdots

斜向三個點：\ddots

換行：\\

下標：值_下標

後面用到再繼續新增！