You have to work a bit harder. The following set of macros sets each subfloat in a zero width box, so adding filling space will do.
The \csubfloat
macro has the same syntax as \subfloat
; beware, though, that images should not fill the whole line.
The \centerhfill
macro has an optional argument, default \quad
to add a space in the center. If it's not enough, you can experiment with \centerhfill[\qquad]
.
In the example I have used the demo
option to graphicx
; don't use it yourself, but don't add dvips
either.
The \fakeig
macro is just for producing the test and you don't need it; just remove the lines and uncomment the \includegraphics
ones.
\documentclass[11pt]{article}
\usepackage[demo]{graphicx}
\usepackage{subfig}
\newcommand{\csubfloat}[2][]{%
\makebox[0pt]{\subfloat[#1]{#2}}%
}
\newcommand{\centerhfill}[1][\quad]{\hspace{\stretch{0.5}}#1\hspace{\stretch{0.5}}}
% This is for the example
\newcommand{\fakeig}[2]{\includegraphics[width=#1,height=#2]{foo}}
\begin{document}
\begin{figure}[htp]
\centering
\hspace*{\fill}%
\csubfloat[From $n=0$ to $n=-1$]{\label{fig:a}%
% \includegraphics[scale=0.45]{Figures/IncludePyramid_a_reverse.eps}%
\fakeig{2cm}{2cm}%
}\centerhfill
\csubfloat[From $n=-1$ to $n=0$]{\label{fig:aa}%
% \includegraphics[scale=0.45]{Figures/IncludePyramid_a.eps}%
\fakeig{2cm}{2cm}%
}\hspace*{\fill}
\hspace*{\fill}%
\csubfloat[From $n=-1$ to $n=-2$]{\label{fig:b}%
% \includegraphics[scale=0.45]{Figures/IncludePyramid_b_reverse.eps}%
\fakeig{3cm}{3cm}%
}\centerhfill
\csubfloat[From $n=-2$ to $n=-1$]{\label{fig:bb}%
% \includegraphics[scale=0.45]{Figures/IncludePyramid_b.eps}%
\fakeig{3cm}{3cm}%
}\hspace*{\fill}
\hspace*{\fill}%
\csubfloat[From $n=-2$ to $n=-3$]{\label{fig:c}%
% \includegraphics[scale=0.45]{Figures/IncludePyramid_c_reverse.eps}%
\fakeig{4cm}{4cm}%
}\centerhfill
\csubfloat[From $n=-3$ to $n=-2$]{\label{fig:cc}%
% \includegraphics[scale=0.45]{Figures/IncludePyramid_c.eps}%
\fakeig{4cm}{4cm}%
}\hspace*{\fill}
\caption{Random walk on the Pascal pyramid}
\label{fig:bratelli}
\end{figure}
\end{document}
Note a generous usage of %
to mask end-of-lines that act like spaces, which are not wanted.

Another option would be to include each \subfloat
in a minipage
as wide as half the \textwidth
, but you have less control about the center spacing; this could be modified using a fraction of \textwidth
, say \begin{minipage}{.8\textwidth}
or similar.
\documentclass[11pt]{article}
\usepackage[demo]{graphicx}
\usepackage{subfig}
% This is for the example
\newcommand{\fakeig}[2]{\includegraphics[width=#1,height=#2]{foo}}
\begin{document}
\begin{figure}[htp]
\centering
\begin{minipage}{.5\textwidth}\centering
\subfloat[From $n=0$ to $n=-1$]{\label{fig:a}%
% \includegraphics[scale=0.45]{Figures/IncludePyramid_a_reverse.eps}%
\fakeig{2cm}{2cm}%
}
\end{minipage}%
\begin{minipage}{.5\textwidth}\centering
\subfloat[From $n=-1$ to $n=0$]{\label{fig:aa}%
% \includegraphics[scale=0.45]{Figures/IncludePyramid_a.eps}%
\fakeig{2cm}{2cm}%
}
\end{minipage}
\begin{minipage}{.5\textwidth}\centering
\subfloat[From $n=-1$ to $n=-2$]{\label{fig:b}%
% \includegraphics[scale=0.45]{Figures/IncludePyramid_b_reverse.eps}%
\fakeig{3cm}{3cm}%
}
\end{minipage}%
\begin{minipage}{.5\textwidth}\centering
\subfloat[From $n=-2$ to $n=-1$]{\label{fig:bb}%
% \includegraphics[scale=0.45]{Figures/IncludePyramid_b.eps}%
\fakeig{3cm}{3cm}%
}
\end{minipage}
\hspace*{\fill}%
\begin{minipage}{.5\textwidth}\centering
\subfloat[From $n=-2$ to $n=-3$]{\label{fig:c}%
% \includegraphics[scale=0.45]{Figures/IncludePyramid_c_reverse.eps}%
\fakeig{4cm}{4cm}%
}
\end{minipage}%
\begin{minipage}{.5\textwidth}\centering
\subfloat[From $n=-3$ to $n=-2$]{\label{fig:cc}%
% \includegraphics[scale=0.45]{Figures/IncludePyramid_c.eps}%
\fakeig{4cm}{4cm}%
}
\end{minipage}
\caption{Random walk on the Pascal pyramid}
\label{fig:bratelli}
\end{figure}
\end{document}
graphicx
, like thedvips
in your case, is no longer required and also not recommended. Modern LaTeX versions don't have an issue detecting the correct driver themselves and stating a wrong driver will cause problems. – Martin Scharrer♦ Jul 1 '13 at 10:35adjustbox
package, especially thecenter
key, i.e.\begin{adjustbox}{center=<value>} .. \end{adjustbox}
. Here a value of about.5\textwidth-5mm
should be right. I will post a full answer later when I have more time. – Martin Scharrer♦ Jul 1 '13 at 10:39