LATEX multiple figures side-by-side OR on top of each other

Putting three figures next to each other
\begin{figure}[htb]
\begin{center} \subfigure[label1]{\label{fig:stefan23}\includegraphics[scale=0.35]{stefanCIF300fIDR6.023.eps}}
\subfigure[label2]{\label{fig:stefan24}\includegraphics[scale=0.35]{stefanCIF300fIDR6.024.eps}}
\subfigure[label3]{\label{fig:ste24-23}\includegraphics[scale=0.35]{stefanCIF300fIDR6.24-23BW1.eps}}
\end{center}
\caption{YCbCr components for Stefan sequence.}
\label{fig:stefanResidual}
\end{figure}


Putting three figures on top of each other

\begin{figure}[ht]
\centering
\subfigure[First frame from Stockholm.]{
\includegraphics[width=3in]{Stockholm_1st.eps}
\label{Stockholm_1st}
}\\
\subfigure[First frame from Mobile.]{
\includegraphics[width=3in]{Mobile_1st.eps}
\label{Mobile_1st}
}\\
\subfigure[First frame from Shields.]{
\includegraphics[width=3in]{Shields_1st.eps}
\label{Shields_1st}
}
\caption{Test sequences.}
\label{TS}
\end{figure}