[Tex/LaTex] Align captions of subfigures:

captionssubfloats

Hi I want to include the following two tikz figures in my document:

\documentclass{article}

\usepackage{tikz}
\usepackage{subcaption}


\begin{document}
\begin{figure}
\begin{subfigure}[l]{.46\textwidth}
\centering
\resizebox{.8\textwidth}{!}{%
\begin{tikzpicture}
[bend angle =60,inner sep=0pt, minimum size =10mm,very thick,
from/.style={<-},
towards/.style={->},
protein/.style={circle,draw=black,very thick},
reaction/.style={}]
\node[protein] (p) at (-2,0) {$P$};
\node[protein] (ps) at (2,0) {$P^*$}
edge [towards, bend left] node[below=10pt,name=e2,minimum size =0mm] {$E_2$} (p)
edge [from,bend right] node[above=10pt,name=e1,minimum size = 0mm] {$E_1$} (p) ;
\draw[->] (e1) -- +(0pt,-12pt);
\draw[->] (e2) -- +(0pt,12pt);
\end{tikzpicture}%
}
\caption{Goldbeter-Koshland Loop.}
\end{subfigure}
\begin{subfigure}[r]{.46\textwidth}
\resizebox{.8\textwidth}{!}{%
\begin{tikzpicture}
[bend angle =60,inner sep=0pt, minimum size =10mm,very thick,
from/.style={<-},
towards/.style={->},
protein/.style={circle,draw=black,very thick},
reaction/.style={}]
\node[protein] (p) at (-1.5,0) {$P$};
\node[protein] (ps) at (1.5,0) {$P^*$}
edge [towards, bend left] node[below=10pt,name=e2, minimum size =0mm] {$E_2$} (p)
edge [from,bend right] node[above=10pt,name=e1,minimum size =0mm] {$E_1$} (p) ;
\draw[->] (e1) -- +(0pt,-12pt);
\draw[->] (e2) -- +(0pt,12pt);
\node[protein] (q) at (0 , -3) {$Q$};
\node[protein] (qs) at (3 , -3) {$Q^*$}
edge [towards, bend left] node[below=10pt,name=e3, minimum size =0mm] {$E_3$} (q)
edge [from,bend right] node[above=10pt,name=e4,minimum size =0mm] {} (q) ;
\draw[->] (ps) -- +(0pt,-50pt);
\draw[->] (e3) -- +(0pt,12pt);
\end{tikzpicture}%
}
\caption{Goldbeter-Koshland Cascade.}
\end{subfigure}
\end{figure}

\end{document}

Everything is as I want it except that the caption in the two subfigures are not aligned.

Thanks for the help.

Best Answer

You can let the floatrow package do the hard work for you:

\documentclass{article}
\usepackage{tikz}
\usepackage{subcaption}
\usepackage{floatrow}

\begin{document}

\begin{figure}
\ffigbox
{%
\begin{subfloatrow}
\ffigbox[\FBwidth][1.5\FBheight]
  {\caption{Goldbeter-Koshland Loop.}}
  {\resizebox{.4\textwidth}{!}{%
\begin{tikzpicture}
[bend angle =60,inner sep=0pt, minimum size =10mm,very thick,
from/.style={<-},
towards/.style={->},
protein/.style={circle,draw=black,very thick},
reaction/.style={}]
\node[protein] (p) at (-2,0) {$P$};
\node[protein] (ps) at (2,0) {$P^*$}
edge [towards, bend left] node[below=10pt,name=e2,minimum size =0mm] {$E_2$} (p)
edge [from,bend right] node[above=10pt,name=e1,minimum size = 0mm] {$E_1$} (p) ;
\draw[->] (e1) -- +(0pt,-12pt);
\draw[->] (e2) -- +(0pt,12pt);
\end{tikzpicture}%
}}%
\ffigbox[\FBwidth]
{\caption{Goldbeter-Koshland Cascade.}}
{\resizebox{.4\textwidth}{!}{%
\begin{tikzpicture}
[bend angle =60,inner sep=0pt, minimum size =10mm,very thick,
from/.style={<-},
towards/.style={->},
protein/.style={circle,draw=black,very thick},
reaction/.style={}]
\node[protein] (p) at (-1.5,0) {$P$};
\node[protein] (ps) at (1.5,0) {$P^*$}
edge [towards, bend left] node[below=10pt,name=e2, minimum size =0mm] {$E_2$} (p)
edge [from,bend right] node[above=10pt,name=e1,minimum size =0mm] {$E_1$} (p) ;
\draw[->] (e1) -- +(0pt,-12pt);
\draw[->] (e2) -- +(0pt,12pt);
\node[protein] (q) at (0 , -3) {$Q$};
\node[protein] (qs) at (3 , -3) {$Q^*$}
edge [towards, bend left] node[below=10pt,name=e3, minimum size =0mm] {$E_3$} (q)
edge [from,bend right] node[above=10pt,name=e4,minimum size =0mm] {} (q) ;
\draw[->] (ps) -- +(0pt,-50pt);
\draw[->] (e3) -- +(0pt,12pt);
\end{tikzpicture}%
}}%
\end{subfloatrow}}{}
\end{figure}

\end{document}

enter image description here

Related Solutions

[Tex/LaTex] Align subfigures vertically

You say that the MWE doesn't give the desired formatting but you do not say what layout you want.

You have one full width figure and one 30%-width figure. It might have been simpler to have them both full width but assuming that you want them that size, but want the smaller one centred, then perhaps:

\begin{figure}\centering
        \begin{subfigure}[b]{\textwidth}
                \centering
                \chemfig{C(=[:0]O)(=[:180]O)}\;
                \chemfig{H-[::37.775,2]O-[::-75.55,2]H}\;
                \caption{Chemical Database}
                \label{fig:database}
        \end{subfigure}\\[10em]
        %~ %add desired spacing between images, e. g. ~, \quad, \qquad etc. 
          %(or a blank line to force the subfigure onto a new line)
        \begin{subfigure}[b]{0.3\textwidth}
                \centering
                \chemfig{C(-[:90]H)(-[:270]H)(=[:0]C(=[:0]C(-[:90]H)(-[:270]H)))}
                \caption{Query formula}
        \end{subfigure}
        \caption{Query}\label{fig:query}
\end{figure}

[Tex/LaTex] Subfigures with Captions Above AND Below

The title is a little ambiguous; do you want one subfigure with two captions, one above and the other below, or do you want two subfigures, one subfigure with its caption below and another one with its caption above?

Anyway, I present a possible solution for both cases. For the first one, the idea is to use "fake" subfigures having no height but with the same width of the actual subfigures (I used \rules); the captions for those fake subfigures will be the above captions for the real ones.

The second case is a little more involved and required the use of the powerful floatrow package.

The code (depending on your actual figures you might need to adjust the lengths I used in my example):

\documentclass{article}
\usepackage[a6paper]{geometry}% just for the example
\usepackage[demo]{graphicx}
\usepackage{subfig}
\usepackage{floatrow}
\captionsetup[subfigure]{labelformat=empty,justification=raggedright} 

\begin{document}

\begin{figure}
\subfloat[A subfigure with a caption above]{\rule{3cm}{0pt}}\quad
\subfloat[Another subfigure with a caption above]{\rule{3cm}{0pt}}\\[0.6ex]
\subfloat[A subfigure with a caption below]{\includegraphics[width=3cm,height=2cm]{image1}}\quad
\subfloat[Another subfigure with a caption below]{\includegraphics[width=3cm,height=2cm]{image2}}
\caption{A figure with two subfigures}
\label{fig:test1}
\end{figure}

\begin{figure}
\ffigbox[\FBwidth]
{\begin{subfloatrow}
\ffigbox[\FBwidth]
  {\caption{A subfigure with a caption below}}
  {\includegraphics[width=3cm,height=2cm]{image1}}
\floatsetup[subfigure]{capposition=TOP}
\raisebox{1.3\height}{%
\ffigbox[\FBwidth]
  {\caption{A subfigure with a caption above}}  
  {\includegraphics[width=3cm,height=2cm]{image1}}
}%
\end{subfloatrow}}
{\caption{Another figure with two subfigures\label{fig:test2}}}
\end{figure}

\end{document}

enter image description here

The demo option for graphicx simply replaces actual figures with black rectangles; do not use that option in your actual document.

Best Answer

Related Solutions

[Tex/LaTex] Align subfigures vertically

[Tex/LaTex] Subfigures with Captions Above AND Below

Related Question