\documentstyle[subfloat]{article}
\title{about {\tt subfloat.sty}}
\author{the author}
\date{Aug. 7, 1993}
\unitlength=1mm
\def\subpicture#1{\begin{picture}(50,7)(0,0)
\put(0,0){\framebox(50,7){#1}}\end{picture}}
\begin{document}
\maketitle
\begin{enumerate}
\item Subcaptions are specified by \verb+\subcaption{...}+ or
\verb+\subcaption*{...}+. While the former sets a heading
with for example `Figure' and figure number with subnumber,
the latter sets only the subnumber.
\item Always need to specify the main \verb+\caption{...}+.
\item Figure captions are always located BELOW the figures, while
table captions are ABOVE the tables including the main caption.
\item Subnumber system can be set by \verb+\subfloatcap+.
Its default is
\begin{verbatim}
\def\subfloatcap{-\alph{subfloatnumber}}
\end{verbatim}
\item \verb+\NoSubfloatCaptionHead+ will remove headings
for subcaptions such as `Figure' or `Table' plus figure numbers.
\end{enumerate}
In the case of figures, we need to set
\begin{verbatim}
\begin{figure}[h]
......
\subcaption{First Figure}
\label{fig:1}
......
\subcaption{Second Figure}
\label{fig:2}
\caption{Three Subfigures}
\label{fig:all}
\end{figure}
\end{verbatim}
Then typical outputs are shown in the {\bf Fig. \ref{fig:all}}.
\begin{figure}[t]
\begin{center}
\subpicture{First}
\subcaption{First Figure}
\label{fig:1}
\end{center}
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{Second}
\subcaption{Second Figure}
\label{fig:2}
\end{center}
\end{minipage}
~
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{Third}
\subcaption{Third Figure}
\label{fig:3}
\end{center}
\end{minipage}
\caption{Three Subfigures}
\label{fig:all}
\end{figure}
On the other hand, {\bf Fig. \ref{fig:all2}} shows a modified
caption without figure number but with subnumber
using \verb+\subcaption*+, where the subnumber is set to
\begin{verbatim}
\def\subfloatcap{(\alph{subfloatnumber})}
\end{verbatim}
\begin{figure}[b]
\def\subfloatcap{(\alph{subfloatnumber})}
\begin{center}
\subpicture{Fourth}
\subcaption*{Fourth Figure}
\label{fig:4}
\end{center}
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{Fifth}
\subcaption*{Fifth Figure}
\label{fig:5}
\end{center}
\end{minipage}
~
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{Sixth}
\subcaption*{Sixth Figure}
\label{fig:6}
\end{center}
\end{minipage}
\caption{The Next Three Subfigures}
\label{fig:all2}
\end{figure}
Of course, you can refer to these figures individually. For example,
\begin{verbatim}
{\bf Fig. \ref{fig:5}} shows that the results given in
{\bf Figs. \ref{fig:1}} and {\bf \ref{fig:2}} can be $\cdots$.
\end{verbatim}
will result in \vspace{2ex}
\fbox{\begin{minipage}{.75\textwidth}
{\bf Fig. \ref{fig:5}} shows that the results given in
{\bf Figs. \ref{fig:1}} and {\bf \ref{fig:2}} can be $\cdots$.
\end{minipage}}\vspace{2ex}
The default of the numbering system is shown above, and can be
changed by redefining \verb+\subfloatcap+ also shown above.
The examples of table environment in the next page use a new
definition as
\begin{verbatim}
\def\subfloatcap{-(\roman{subfloatnumber})}
\end{verbatim}
\def\subfloatcap{-(\roman{subfloatnumber})}
\begin{verbatim}
\begin{table}[h]
\caption{Three Subtables}
\label{tab:all}
......
\subcaption{First Table}
\label{tab:1}
......
\subcaption{Second Table}
\label{tab:2}
\end{table}
{\bf Table. \ref{tab:1}} shows that $\cdots$ because $\cdots$ as
shown in {\bf Tables \ref{tab:3}} and {\bf \ref{tab:6}}.
\end{verbatim}
\begin{table}[t]
\caption{Three Subtables}
\label{tab:all}
\begin{center}
\subpicture{First}
\subcaption{First Table}
\label{tab:1}
\end{center}
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{Second}
\subcaption{Second Table}
\label{tab:2}
\end{center}
\end{minipage}
~
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{Third}
\subcaption{Third Table}
\label{tab:3}
\end{center}
\end{minipage}
\end{table}
\begin{table}[b]
\caption{The Next Three Subtables}
\label{tab:all2}
\begin{center}
\subpicture{Fourth}
\subcaption{Fourth Table}
\label{tab:4}
\end{center}
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{Fifth}
\subcaption{Fifth Table}
\label{tab:5}
\end{center}
\end{minipage}
~
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{Sixth}
\subcaption{Sixth Table}
\label{tab:6}
\end{center}
\end{minipage}
\end{table}
{\bf Table. \ref{tab:1}} shows that $\cdots$ because $\cdots$ as
shown in {\bf Tables \ref{tab:3}} and {\bf \ref{tab:6}}.
If you do NOT need a header of subsections, insert a line of
\begin{verbatim}
\NoSubfloatCaptionHead
\end{verbatim}
at an appropriate position in that specific figure environment.
\begin{figure}[t]
\NoSubfloatCaptionHead
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{First}
\subcaption{First Figure}
\end{center}
\end{minipage}
~
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{Second}
\subcaption{Second Figure}
\end{center}
\end{minipage}
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{Third}
\subcaption{Third Figure}
\end{center}
\end{minipage}
~
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{Fourth}
\subcaption{Fourth Figure}
\end{center}
\end{minipage}
\caption{Four Subfigures without headers}
\end{figure}
\begin{figure}[b]
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{First}
\subcaption{First Figure}
\end{center}
\end{minipage}
~
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{Second}
\subcaption{Second Figure}
\end{center}
\end{minipage}
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{Third}
\subcaption{Third Figure}
\end{center}
\end{minipage}
~
\begin{minipage}[t]{.47\textwidth}
~
\begin{center}
\subpicture{Fourth}
\subcaption{Fourth Figure}
\end{center}
\end{minipage}
\caption{Four Subfigures with headers}
\end{figure}
\end{document}