Graphics, Figures & Tables ⇒ How can we number a matrix with row/column names?

[jjmm]

Hi,

We know how to label a matrix and reference it. It is done by \label and \ref. Could we label a matrix with a label and reference it likewise?

This matrix with a label is from here

https://tex.stackexchange.com/questions ... characters

Code: Select all

\documentclass[12pt]{report}
\usepackage{blkarray}
\usepackage{amsmath}

\begin{document}

\[
\begin{blockarray}{cccccc}
a & b & c & d & e \\
\begin{block}{(ccccc)c}
  1 & 1 & 1 & 1 & 1 & f \\
  0 & 1 & 0 & 0 & 1 & g \\
  0 & 0 & 1 & 0 & 1 & h \\
  0 & 0 & 0 & 1 & 1 & i \\
  0 & 0 & 0 & 0 & 1 & j \\
\end{block}
\end{blockarray}
 \]

\end{document}

[Johannes_B]

You chose an unnumbered math environment. Simply use a numbered one.

Code: Select all

\documentclass[12pt]{report}
    \usepackage{blkarray}
    \usepackage{amsmath}
     
    \begin{document}
     
     \begin{equation}
    \begin{blockarray}{cccccc}
    a & b & c & d & e \\
    \begin{block}{(ccccc)c}
      1 & 1 & 1 & 1 & 1 & f \\
      0 & 1 & 0 & 0 & 1 & g \\
      0 & 0 & 1 & 0 & 1 & h \\
      0 & 0 & 0 & 1 & 1 & i \\
      0 & 0 & 0 & 0 & 1 & j \\
    \end{block}
    \end{blockarray}
\label{matrix}
     \end{equation}
     
look at \ref{matrix}
    \end{document}

[jjmm]

Thank you, Johannes! It works!