caption in a tikz object

Question

I created markov's chain using tikz package. Now I would add to to it caption and label but I got error.How can I add a caption and a label to a tikz object?

Answer 1

In case you want to use floating environments, you will need to include the TikZ picture in a figure environment:

\begin{figure}
\begin{tikzpicture}
...% TikZ code goes here
\end{tikzpicture}
\caption{whatever}
\label{f‌​ig:my_fav_tikz}
\end{figure}

If you don't want floats, see Gonzalo Medina's answer.

Answer 2

If you don't want the object to float, you can use, for example, a minipage and \captionof from the caption package.

If you want the object to be treated as a floating object, you can enclose it within a figure environment.

A simple example illustrating both approaches:

\documentclass{article}
\usepackage{tikz}
\usepackage{caption}

\begin{document}

\begin{figure}
\centering
\begin{tikzpicture}
\draw (0,0) circle (1cm);
\end{tikzpicture}
\caption{A tikz circle}
\label{fig:testb}
\end{figure}

\noindent\begin{minipage}{\textwidth}
\centering
\begin{tikzpicture}
\draw (0,0) circle (1cm);
\end{tikzpicture}
\captionof{figure}{A tikz circle}
\label{fig:testa}
\end{minipage}

\end{document}