# Matrices in LaTeX

• LaTeX
lo2

## Main Question or Discussion Point

Hi there I am writing about linear algebra and therefore I need to type matrices. I thought I could do this.

\newcommand{\metar}[16]{\left [ \begin{array}{cccc} #1 & #2 & #3 & #4 \\ #5 & #6 & #7 & #8 \\ #9 & #10 & #11 & #12 \\ #13 & #14 & #15 & #16 \end{array} \right ] }

But I get errors and it does not look as desired...

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Is this all you were trying to do?

$$\left[ \begin{array}{cccc} 1 & 2 & 3 & 4 \\ 5 & 6 & 7 & 8 \\ 9 & 10 & 11 & 12 \\ 13 & 14 & 15 & 16 \end{array} \right]$$

just click on the above and you can see the TeX. You basically had everything there.

Last edited:
The amsmath package also gives you 5 matrix environments:
Code:
\documentclass[article]{memoir}
\usepackage{amsmath}
\begin{document}
$\begin{pmatrix} 1 & 2 & 3 & 4\\ 5 & 6 & 7 & 8\\ 9 &10 &11 &12\\ 13&14 &15 &16 \end{pmatrix} \begin{bmatrix} 1 & 2 & 3 & 4\\ 5 & 6 & 7 & 8\\ 9 &10 &11 &12\\ 13&14 &15 &16 \end{bmatrix} \begin{Bmatrix} 1 & 2 & 3 & 4\\ 5 & 6 & 7 & 8\\ 9 &10 &11 &12\\ 13&14 &15 &16 \end{Bmatrix} \begin{vmatrix} 1 & 2 & 3 & 4\\ 5 & 6 & 7 & 8\\ 9 &10 &11 &12\\ 13&14 &15 &16 \end{vmatrix} \begin{Vmatrix} 1 & 2 & 3 & 4\\ 5 & 6 & 7 & 8\\ 9 &10 &11 &12\\ 13&14 &15 &16 \end{Vmatrix}$
\end{document}