Ivan K (Montag, 21. Dezember 2015 05:31):
> In any case, I have an example appended with uses subfigure,
> and I wonder if someone could explain to me the syntax that
> I should use to switch this example to the subcaption
> package.
Either:
\documentclass[letterpaper]{book}
\usepackage{graphicx}
\usepackage{subcaption}
\usepackage{mwe}
\begin{document}
\begin{figure}
\centering
\begin{subfigure}{3.25in}
\includegraphics[width=\linewidth,totalheight=2.00in]{example-
image-a}
\caption{.05 seconds of a Bassoon Tone at 130 hertz (C3)}
\label{fig:bassoon_plot_01}%
\end{subfigure}%
\nobreak\enskip\nobreak% Only to have the same oversized result as
before
\begin{subfigure}{3.25in}
\includegraphics[width=\linewidth,totalheight=2.00in]{example-
image-b}%
\caption{.05 seconds of a Bassoon Tone at 440 hertz (A4)}
\label{fig:bassoon_plot_02}%
\end{subfigure}%
\caption{%
Comparing plots of the sound wave of two bassoon
tones of .05 seconds each%
}
\label{fig:twobassoontones}
\end{figure}
\end{document}
or
\documentclass[letterpaper]{book}
\usepackage{graphicx}
\usepackage{subcaption}
\usepackage{mwe}
\begin{document}
\begin{figure}
\centering
\subcaptionbox{.05 seconds of a Bassoon Tone at 130 hertz
(C3)\label{fig:bassoon_plot_01}}{%
\includegraphics[width=3.25in,totalheight=2.00in]{example-image-a}
}%
\subcaptionbox{.05 seconds of a Bassoon Tone at 440 hertz
(A4)\label{fig:bassoon_plot_02}}{%
\includegraphics[width=3.25in,totalheight=2.00in]{example-image-b}%
}
\caption{%
Comparing plots of the sound wave of two bassoon
tones of .05 seconds each%
}
\label{fig:twobassoontones}
\end{figure}
\end{document}
You should note that in your example 3.25in + 3.25in + several white spaces
is more than \textwidth. I have not changed this but tried to immitate the
result of your example.