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   Browse: Home / LaTeX / How to create a matrix in LaTeX

How to create a matrix in LaTeX

   By Selinap on May 18, 2009

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   We can create a matrix in LaTeX using the array environment, or
   simplematrix, matrix, pmatrix, bmatrix, vmatrix, and Vmatrix
   environments via amsmath package. This article provides some examples
   on how to create a matrix in LaTeX.

Creating a matrix with array

   Here are some examples.
    1. unbracketed matrix
       m1
\[
M =
\begin{array}{cc}
x & y \\
z & w \\
\end{array}
\]
    2. matrix surrounded by square brackets
       m2
\[
M =
\left[ {\begin{array}{cc}
 x & y  \\
 z & w  \\
 \end{array} } \right]
\]
    3. matrix surrounded by parentheses
       m3
\[
M =
\left( {\begin{array}{cc}
 x & y  \\
 z & w  \\
 \end{array} } \right)
\]
    4. matrix surrounded by single vertical lines
       m4
\[
M =
\left| {\begin{array}{cc}
 x & y  \\
 z & w  \\
 \end{array} } \right|
\]

Using amsmath package

   Call \usepackage{amsmath} in the preamble, after \documentclass{}.

   The amsmath package environment for matrix:
    1. smallmatrix: inline matrix
       m5
$M = \begin{smallmatrix} x&y\\ z&w \end{smallmatrix}$
$M = \left( \begin{smallmatrix} x&y\\ z&w \end{smallmatrix}\right)$
    2. matrix: unbracketed matrix
       m6
$M = \begin{matrix} x&y\\ z&w \end{matrix}$
    3. pmatrix: matrix surrounded by parentheses
       m7
$M = \begin{pmatrix} x&y\\ z&w \end{pmatrix}$
    4. bmatrix: matrix surrounded by square brackets
       m8
$M = \begin{bmatrix} x&y\\ z&w \end{bmatrix}$
    5. vmatrix: matrix surrounded by single vertical lines
       m9
$M = \begin{vmatrix} x&y\\ z&w \end{vmatrix}$
    6. Vmatrix: matrix surrounded by double vertical lines
       m10
$M = \begin{Vmatrix} x&y\\ z&w \end{Vmatrix}$

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   Posted in LaTeX | Tagged amsmath, array, bmatrix, documentclass,
   environment, LaTeX, matrix, package, pmatrix, simplematrix, usepackage,
   vmatrix | 5 Responses

5 responses to “How to create a matrix in LaTeX”

    1. ufw
       ufw
       January 10, 2010 at 10:06 pm | Permalink | Reply
       Awesome, thanks a lot!
    2. lmods
       lmods
       April 27, 2010 at 11:08 am | Permalink | Reply
       gracias me ha servido de mucho… thanks
    3. jeanounou
       jeanounou
       August 24, 2010 at 7:36 am | Permalink | Reply
       How about a border matrix? How can I write a circle around a
       letter, like in “copyright” or “registered trademark”? Is it
       possible to have a circle around all letters (not only C and R)?
       Thanks.
         1. Selinap
            Selinap
            August 24, 2010 at 8:02 am | Permalink | Reply
            @jeanounou: You can use TikZ
            (http://en.wikipedia.org/wiki/PGF/TikZ) to put a letter in a
            circle.
            For example (adapted from here):
\documentclass{article}
\usepackage{tikz}

\newcommand*\circleit[1]{%
    \tikz[baseline=(C.base)]\node[draw,circle,inner sep=0.7pt](C) {#1};\!
}

\begin{document}
The letter A in a circle: $\circleit{A}$
\end{document}
    4. Dafe
       Dafe
       October 26, 2010 at 1:19 pm | Permalink | Reply
       That’s very helpful, thank you.

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