The trick is to put your graphics in a \vcenter
box. The rest is just bureaucracy: \vcenter
requires math mode, and \hbox
prevents the image from taking the whole line width.
\documentclass{article}
\usepackage{graphics}
\newcommand\myincludegraphics[1]{%
\ensuremath{\vcenter{\hbox{\includegraphics{#1}}}}%
}
\begin{document}
\begin{figure}
\centering
\renewcommand\arraystretch{3}
\begin{tabular}{rcl}
description&\myincludegraphics{gfx/test}&description\\
description&\myincludegraphics{gfx/test}&description\\
description&\myincludegraphics{gfx/test}&description\\
description&\myincludegraphics{gfx/test}&description\\
&0\hfill 5\hfill\hfill 15\hfill\hfill\hfill 30&min
\end{tabular}
\caption{A caption}
\label{fig:figure}
\end{figure}
\end{document}
EDIT: This version deals with descriptions of different lengths, keeping the images horizontally centered no matter what.
The main idea is to put the left descriptions in a \llap
(so it will stick out to the left, while pretending to 0pt
wide) and the right descriptions in a \hbox to 0pt
(these will pretend to be 0pt
wide but stick out to the right --- by the way, \rlap
doesn't work well in this case).
The rest is to make things easy to use. Package array
allows to you automatically but arbitrary code around your entries using <
and >
. Furthermore, it allows you to define new column types. So I put all the \llap
and \hbox
magic in the column type C
, and included the vertical positioning magic in there as well. This should make things easier to use.
Since the middle column type was redefined, the old timeline didn't work anymore, so I used \multicolumn
to reset the middle column type for the last line back to a simple c
. While at it, I have packed it all in a macro to save some further typing. (Maybe we should make it extremely fancy by making LaTeX position the numbers on the timeline automatically? :-))))
\documentclass{article}
\usepackage{graphicx}
\usepackage{array}
\newcolumntype{C}{%
>{\llap\bgroup}c<{\egroup}%
>{$\vcenter\bgroup\hbox\bgroup}c<{\egroup\egroup$}
>{\hbox to 0pt\bgroup}c<{\egroup}%
}%
\newcommand\timeline[1]{&\multicolumn{1}{c}{#1}&min}
\begin{document}
\begin{figure}
\centering
\renewcommand\arraystretch{3}
\begin{tabular}{C}
description long&\includegraphics{gfx/test}&desc\\
description&\includegraphics{gfx/test}&description very very extremely long\\
description&\includegraphics{gfx/test}&desc\\
description&\includegraphics{gfx/test}&descript\\
\timeline{0\hfill 5\hfill\hfill 15\hfill\hfill\hfill 30}
\end{tabular}
\caption{A caption}
\label{fig:figure1}
\end{figure}
\begin{figure}
\centering
\renewcommand\arraystretch{3}
\begin{tabular}{C}
description long&\includegraphics{gfx/test}&desc\\
description very very extremely long&\includegraphics{gfx/test}&desc\\
description&\includegraphics{gfx/test}&desc\\
description&\includegraphics{gfx/test}&descript\\
\timeline{%
\makebox[0pt][c]{0}\hfill
\makebox[0pt][c]{5}\hfill\hfill
\makebox[0pt][c]{15}\hfill\hfill\hfill
\makebox[0pt][c]{30}}
\end{tabular}
\caption{A caption}
\label{fig:figure2}
\end{figure}
\end{document}
UPDATE 2: Automatic tick-placement (for fun) and fixed intercolumn spacing (for real):
\documentclass{article}
\usepackage{graphicx}
\usepackage{array}
\newcolumntype{C}{%
>{\llap\bgroup}c<{\egroup\hskip 1em}%
@{}>{$\vcenter\bgroup\hbox\bgroup}c<{\egroup\egroup$}@{}
>{\hskip 1em\hbox to 0pt\bgroup}c<{\egroup}%
}%
\usepackage{etoolbox}
\newcommand\timeline[1]{%
&\multicolumn{1}{@{}c@{}}\begingroup
\global\let\do\firstT
\docsvlist{#1}%
\endgroup&min%
}
\def\firstT#1{\makebox[0pt][c]{#1}\xdef\previousT{#1}\global\let\do\otherTs}
\def\otherTs#1{%
\count0=#1\relax \advance\count0-\previousT\relax
\loop\ifnum\count0>0 \typeout{\the\count0}\advance\count0-1 \hfill\repeat
\makebox[0pt][c]{#1}\xdef\previousT{#1}%
}
\begin{document}
\begin{figure}
\centering
\renewcommand\arraystretch{3}
\begin{tabular}{C}
description long&\includegraphics{gfx/test}&desc\\
description&\includegraphics{gfx/test}&description very very extremely long\\
description&\includegraphics{gfx/test}&desc\\
description&\includegraphics{gfx/test}&descript\\
\timeline{0,5,15,30}\\
\timeline{0,10,20,30}\\
\timeline{0,20,25,30}\\
\end{tabular}
\caption{A caption}
\label{fig:figure1}
\end{figure}
\begin{figure}
\centering
\renewcommand\arraystretch{3}
\begin{tabular}{C}
description long&\includegraphics{gfx/test}&desc\\
description very very extremely long&\includegraphics{gfx/test}&description\\
description&\includegraphics{gfx/test}&desc\\
description&\includegraphics{gfx/test}&descript\\
\timeline{0,2,4,6,8,10,20,30}
\end{tabular}
\caption{A caption}
\label{fig:figure1}
\end{figure}
\end{document}
UPDATE: left-aligned left description
I don't know how to do this automatically, because one needs to know the width of the widest left description in advance. A semi-automatic solution is to set this length in advance, just before the tabular
environment --- the column definiton then puts the left description in a \hbox
of the given width.
\documentclass{article}
\usepackage{graphicx}
\usepackage{array}
\newlength\widestLeftEntryLength
\newcolumntype{C}{%
>{\llap\bgroup\hbox to \widestLeftEntryLength\bgroup}c<{\hss\egroup\egroup\hskip 1em}%
@{}>{$\vcenter\bgroup\hbox\bgroup}c<{\egroup\egroup$}@{}
>{\hskip 1em\hbox to 0pt\bgroup}c<{\egroup}%
}%
\begin{document}
\begin{figure}
\centering
\renewcommand\arraystretch{3}
\settowidth\widestLeftEntryLength{description very very extremely long}
\begin{tabular}{C}
description long&\includegraphics{gfx/test}&desc\\
description very very extremely long&\includegraphics{gfx/test}&description\\
description&\includegraphics{gfx/test}&desc\\
description&\includegraphics{gfx/test}&descript\\
\end{tabular}
\caption{A caption}
\label{fig:figure2}
\end{figure}
\end{document}
The problem comes from the adjustbox
; if you replace it with a minipage
surrounded with an \fbox
, the subcaptions are centered again:
\documentclass[12pt]{article}
\usepackage{mathptmx}
\usepackage{amsmath}
\usepackage[demo]{graphicx}
\usepackage[margin=0.9in]{geometry}
\usepackage{gensymb}
\usepackage{subcaption}
\usepackage{adjustbox}
\captionsetup[figure]{font=bf}
\captionsetup[subfigure]{font=rm}
\begin{document}
Petroporphyrins, as shown in Figure \ref{fig:porphyrinexamples}, are constituted of four cyclically-bonded pyrroles with various aliphatic, cylcic, and aromatic moieties. The nitrogen of each pyrrole is oriented to the center of the porphyrin, which is where the nickel or vanadium, in the form of vanadium (IV) oxide, coordinates.
\begin{figure}
\fbox{\begin{minipage}{\dimexpr\textwidth-2\fboxsep-2\fboxrule\relax}
\centering
\begin{subfigure}{.45\textwidth}
\centering
\includegraphics[width=.5\linewidth]{Porphyrin.png}
\caption{Unsubstituted Demetalated Porphyrin}
\label{fig:porphyrin}
\end{subfigure}%
\begin{subfigure}{.45\textwidth}
\centering
\includegraphics[width=.5\linewidth]{VPorphyrin.png}
\caption{Unsubstituted Vanadyl Porphyrin}
\label{fig:vporphyrin}
\end{subfigure}
\\
\vspace{18pt}
\begin{subfigure}{.45\textwidth}
\centering
\includegraphics[width=.5\linewidth]{VDPEP.png}
\caption{Vanadyl DPEP}
\label{fig:vdpep}
\end{subfigure}%
\begin{subfigure}{.45\textwidth}
\centering
\includegraphics[width=.5\linewidth]{VEtio.png}
\caption{Vanadyl Etioporphyrin}
\label{fig:vetio}
\end{subfigure}
\\
\vspace{18pt}
\begin{subfigure}{.45\textwidth}
\centering
\includegraphics[width=.5\linewidth]{VBenzoEtio.png}
\caption{Vanadyl Benzoetioporphyrin}
\label{fig:vbenzoetio}
\end{subfigure}%
\begin{subfigure}{.45\textwidth}
\centering
\includegraphics[width=.5\linewidth]{VTHBEtio.png}
\caption{Vanadyl Tetrahydrobenzoetioporphyrin}
\label{fig:vthbetio}
\end{subfigure}
\end{minipage}}
\caption{Several Basic Petroporphyrin Configurations}
\label{fig:porphyrinexamples}
\end{figure}
\end{document}
Regarding the second question, you can use the optional argument for \captionsetup
to have different formatting foe figures and subfigures; in my example code I used
\captionsetup[figure]{font=bf}
\captionsetup[subfigure]{font=rm}
for illustration purposes.
The demo
option for graphicx
simply replaces actual figures with black rectangles; do not use that option in your actual document.
Best Answer
You have specified the width of each subfigure to be
0.3\textwidth
, and that sets the width of the caption. But the included graphic is much wider, so it sticks out.To fix, set the width of the subfigure to be the full column width:
(Thanks to egreg for the helpful comment.)