在“图形”环境中在两幅图像之间插入水平空间

Question

我想将三个图形并排放置，如下面的代码所示。但生成的图像中所有三个图形都挤得很近。我想在图像之间留出一些水平间隔。如何修改下面的代码来实现这一点？

\begin{figure}[ht]
  \centering
  \includegraphics[width=5cm]{./miscimages/1nng-example.png}
  \includegraphics[width=5m]{./miscimages/2nng-example.png}
  \includegraphics[width=5cm]{./miscimages/3nng-example.png}
  \caption{\label{fig:knng} Generating some graphs}
\end{figure}

Answer 1

    \begin{figure}[ht]
    \centering
    \includegraphics[width=5cm]{./miscimages/1nng-example.png}\hfill
    \includegraphics[width=5mm]{./miscimages/2nng-example.png}\hfill
    \includegraphics[width=5cm]{./miscimages/3nng-example.png}
    \caption{\label{fig:knng} Generating some graphs}
\end{figure}

\begin{figure}[ht]
    \centering
    \includegraphics[width=5cm]{./miscimages/1nng-example.png}\hspace{4ex}
    \includegraphics[width=5mm]{./miscimages/2nng-example.png}\hspace{4ex}
    \includegraphics[width=5cm]{./miscimages/3nng-example.png}
    \caption{\label{fig:knng} Generating some graphs}
\end{figure}