# How can I do matrix with 1 column?

I want to make a matrix with elements like in the image: How can I do this?

Thank you!

• \begin{pmatrix} 1 \\ 2 \\ 3 \end{pmatrix} ?, using the amsmath package – user31729 Apr 13 '16 at 14:24

## 2 Answers

A column vector is just a matrix with one column (from a typesetting point of view ;-)), so just use one of the various matrix possibilities and typeset with \\ to switch to the next row.

Of course, mathmode is needed for this.

\documentclass{article}

\usepackage{mathtools}
\begin{document}
$\begin{pmatrix} \alpha_{1} \\ \alpha_{2} \\ \vdots \\ \alpha_{m} \\ \end{pmatrix} \neq \begin{Bmatrix} \alpha_{1} \\ \alpha_{2} \\ \vdots \\ \alpha_{m} \\ \end{Bmatrix} \neq \begin{bmatrix} \alpha_{1} \\ \alpha_{2} \\ \vdots \\ \alpha_{m} \\ \end{bmatrix} \neq \begin{vmatrix} \alpha_{1} \\ \alpha_{2} \\ \vdots \\ \alpha_{m} \\ \end{vmatrix} \neq \begin{Vmatrix} \alpha_{1} \\ \alpha_{2} \\ \vdots \\ \alpha_{m} \\ \end{Vmatrix}$
\end{document}


Use pmatrix for parentheses, Bmatrix for braces and bmatrix for brackets, vmatrix for single vertical lines, Vmatrix for doubled vertical lines. Because this is typical non-LaTeX specific question (because this is question of type: give me a code, I don't want to think about it), I can reply: use simply \pmatrix or \matrix.

Edit The result exactly the same as in the answer above can be accomplished by the code:

\def\mmatrix#1#2#3{\left#1\matrix{#2}\right#3}
$$\pmatrix {\alpha_1 \cr \alpha_2 \cr \vdots \cr \alpha_m} \neq \mmatrix \{ {\alpha_1 \cr \alpha_2 \cr \vdots \cr \alpha_m} \} \neq \mmatrix [ {\alpha_1 \cr \alpha_2 \cr \vdots \cr \alpha_m} ] \neq \mmatrix | {\alpha_1 \cr \alpha_2 \cr \vdots \cr \alpha_m} | \neq \mmatrix \| {\alpha_1 \cr \alpha_2 \cr \vdots \cr \alpha_m} \|$$
\bye