# Multicolumn vector

How can I create a vector like this one?

It is similar to this question, but with additional columns.

• The precise output depends on the desired packages ;-)
– user31729
Oct 8 '14 at 16:39

Quick and dirty approach with pmatrix environment

The individual columns are separated by a & character, the next linebreak is achieved with \\

If one replaces pmatrix with bmatrix, the [ ] version is obtained

\documentclass[12pt]{article}

\usepackage{mathtools}

\begin{document}

\begin{equation*}
A =  \begin{pmatrix}
3 & 5 \\
5 & 2 \\
2 & 1 \\
1 & 4 \\
7 & 9
\end{pmatrix}
\end{equation*}

\end{document}


• Why not \\ instead of \cr? Oct 8 '14 at 16:51
• @Manuel: I always used \cr ;-) If it works with \\  too, the better ;-)
– user31729
Oct 8 '14 at 16:51
• clean enough for me ;-)
– alex
Oct 8 '14 at 16:54
• @ChristianHupfer Can you tell me where in the LaTeX manual or the doc for amsmath there's a description of \cr? Possibly I didn't read them carefully enough. Out of joke: DON'T use \cr in LaTeX documents. Oct 8 '14 at 17:55
• @ChristianHupfer It's not “old style”: it's wrong. You may have seen \matrix{1 & 2\cr 3 & 4\cr} using the LaTeX command inherited from Plain, that's supplanted by matrix of amsmath (and the other environments adding parentheses). See tex.stackexchange.com/questions/57658/… Oct 8 '14 at 18:04