# Subtitle in table

I have a table of the form

\documentclass[12pt,a4paper]{article} %
\begin{document}
\begin{table}
\begin{center}
\caption{\centering How many people \\
\scriptsize     Average over a thousand simulations}
\label{table1}
\begin{tabular}{llll}
$r \backslash 2n$  & 100 & 200& 1000\\
\hline\\
2 & 25.42 & 25.76 &25.47\\
\hline
\end{tabular}
\end{center}
\end{table}
\end{document}


My question is that here I have a nice subtitle, that looks great but that gives me errors when running it. Is there a way to take away the errors but make it look exactly the same? I really don't like \tablenotes.

EDIT: the error I am getting is

 Argument of \caption @ydblarg has an extra }

• Which errors do you mean? Could you provide a complete MWE that we can compile? – Karlo May 18 '17 at 9:31
• Argument of \caption @ydblarg has an extra }. – fox May 18 '17 at 9:43
• Does this question help? – Karlo May 18 '17 at 9:48
• @Karlo: I also just looked at this, and gave me the idea to use the caption package. So: does \usepackage{caption} in the preamble and then \caption{How many people\\ \scriptsize Average over a thousand simulations} produce what you want? I don't think the \centering is needed then, because the default of the caption package is to center anyway for short captions – Wiebke May 18 '17 at 9:58
• I am using the caption package. The answer suggestion works fine, but the title is still aligned to the left. When I write \centering, the error produces – fox May 18 '17 at 10:00

So, by loading the caption package, I obtain a solution:

\documentclass[12pt,a4paper]{article} %
\usepackage{caption}
\begin{document}
\begin{table}
\centering
\caption{ How many people \\
\scriptsize  Average over a thousand simulations}
\label{table1}
\begin{tabular}{llll}
$r \backslash 2n$  & 100 & 200& 1000\\
\hline\\
2 & 25.42 & 25.76 &25.47\\
\hline
\end{tabular}
\end{table}
\end{document}