Adding a equation number to a matrix

Question

I do have a matrix but I can't add a reference number for it as shown in read in the photo below .. any help?

\[
  A=
  \begin{pmatrix}
    0.3 & 0.4 & 0.3 & 0.0 \\
    0.4 & 0.3 & 0.0 & 0.3 \\
    0.3 & 0.0 & 0.4 & 0.3 \\
    0.0 & 0.3 & 0.3 & 0.4
  \end{pmatrix}
\]
\label{e1}

This is because you use \[ ... \] to create the math environment. Replace that by \begin{equation} ... \end{equation} to get a tagged equation. You can find more information on the math environments and their difference in this answer — hbaderts, Jan 27 '16 at 06:49
Consider reading up on some material in What are good learning resources for a LaTeX beginner? — Werner, Jan 27 '16 at 06:51

score 11 · Accepted Answer · answered Jan 27 '16 at 06:50

You should use an equation:

\documentclass{article}
\usepackage{amsmath}
\begin{document}

See~\eqref{eq:myeqn} below.
\begin{equation}
  A=
  \begin{pmatrix}
    0.3 & 0.4 & 0.3 & 0.0 \\
    0.4 & 0.3 & 0.0 & 0.3 \\
    0.3 & 0.0 & 0.4 & 0.3 \\
    0.0 & 0.3 & 0.3 & 0.4
  \end{pmatrix}
  \label{eq:myeqn}
\end{equation}

\end{document}

Adding a equation number to a matrix

1 Answers1