In order to post my note of linear algebra, I need to know how to put matrix using LaTex. The followings are the usage.

Simple matrix

$$
\begin{matrix}
    7 & 8 & 9 \\
    4 & 5 & 6 \\
    1 & 2 & 3
\end{matrix}
$$

Display:
$$
\begin{matrix}
7 & 8 & 9\
4 & 5 & 6\
1 & 2 & 3\end{matrix}
$$

Matrix with brackets

Curly braces {…}

$$
\left\{
\begin{matrix}
    7 & 8 & 9 \\
    4 & 5 & 6 \\
    1 & 2 & 3
\end{matrix}
\right\}
$$

Display:
$$
\left{\begin{matrix}7&8&9\4&5&6\1&2&3\end{matrix}\right}
$$

Square brackets […]

$$
\left[
\begin{matrix}
    7 & 8 & 9 \\
    4 & 5 & 6 \\
    1 & 2 & 3
\end{matrix}
\right]
$$

Display:
$$
\left[
\begin{matrix}
7 & 8 & 9 \
4 & 5 & 6 \
1 & 2 & 3
\end{matrix}
\right]
$$

Matrix with dots

$$
    \left[
    \begin{matrix}
         a_{11}    & a_{12}    & \cdots   & a_{1n}     \\
         a_{21}    & a_{22}    & \cdots   & a_{2n}     \\
         \vdots    & \vdots    & \ddots   & \vdots     \\
         a_{n1}    & a_{n2}    & \cdots   & a_{nn}     \\
    \end{matrix}
    \right]
$$

Display:
$$
\left[
\begin{matrix}
a_{11} & a_{12} & \cdots & a_{1n} \
a_{21} & a_{22} & \cdots & a_{2n} \
\vdots & \vdots & \ddots & \vdots \
a_{n1} & a_{n2} & \cdots & a_{nn} \
\end{matrix}
\right]
$$

Matrix with parameter

$$ 
    \left[
        \begin{array}{cc|c}
          2 & 5 & 6 \\
          9 & 3 & 7
        \end{array}
    \right]
$$

Display:
$$
\left[
\begin{array}{cc|c}
2 & 5 & 6 \
9 & 3 & 7
\end{array}
\right]
$$

Inline matrix

This is an example of inline matrix $\bigl( \begin{smallmatrix} a & b \\ c & d \end{smallmatrix} \bigr)$ and the display is below.

This is an example of inline matrix $\bigl( \begin{smallmatrix} a & b \ c & d \end{smallmatrix} \bigr)$ and the display is below.

Author: o_oyao

Link: http://dyingdown.github.io/2019/09/03/Matrix-of-LaTex/

License: All articles in this blog are licensed under CC BY-NC-SA 4.0 unless stating additionally.