[Tex/LaTex] Vertical Spacing using \subcaption package

subcaption

I have a simple problem. I'm trying to add a little bit of vertical spacing between the top two and bottom two subfigures. Here's my code:

\documentclass{article}
\usepackage[demo]{graphicx}
\usepackage{caption}
\usepackage{subcaption}
\begin{document}
\begin{figure}
\centering
\begin{subfigure}{.5\textwidth}
  \centering
  \includegraphics[scale=0.2]{CHRe100t0_5.jpg}
  \caption{t = 0.5 s and Re = 100}
\end{subfigure}%
\begin{subfigure}{.5\textwidth}
  \centering
  \includegraphics[scale=0.2]{ChRe100t1.jpg}
  \caption{t = 1.0 s and Re = 100}
\end{subfigure}
\begin{subfigure}{.5\textwidth}
   \centering
   \includegraphics[scale=0.2]{CHRe100t1_5.jpg}
   \caption{t = 1.5 s and Re = 100}
\end{subfigure}%
\begin{subfigure}{.5\textwidth}
\centering
   \includegraphics[scale=0.2]{CHRe100t2.jpg}
   \caption{t = 2.0 s and Re = 100}
\end{subfigure}
\caption{y vs. u}
\end{figure}
\end{document}

Any suggestions would be greatly appreciated!

Best Answer

You could insert the instructions \par\bigskip between the second and third subfigure to create a bit of extra vertical space between the two sets of subfigures. If \bigskip is too much for your taste, try using \medskip.

enter image description here

\documentclass{article}
\usepackage[demo]{graphicx} % omit 'demo' option in real document
\usepackage{subcaption}
\begin{document}
\begin{figure}
\centering
\begin{subfigure}{.49\textwidth}
  \centering
  \includegraphics[scale=0.2]{CHRe100t0_5.jpg}
  \caption{t = 0.5 s and Re = 100}
\end{subfigure}
\begin{subfigure}{.49\textwidth}
  \centering
  \includegraphics[scale=0.2]{ChRe100t1.jpg}
  \caption{t = 1.0 s and Re = 100}
\end{subfigure}
\par\bigskip % force a bit of vertical whitespace
\begin{subfigure}{.49\textwidth}
   \centering
   \includegraphics[scale=0.2]{CHRe100t1_5.jpg}
   \caption{t = 1.5 s and Re = 100}
\end{subfigure}
\begin{subfigure}{.49\textwidth}
\centering
   \includegraphics[scale=0.2]{CHRe100t2.jpg}
   \caption{t = 2.0 s and Re = 100}
\end{subfigure}
\caption{y vs. u}
\end{figure}
\end{document}
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