This is to introduce how to plot figures in Latex side by side

LaTeX_figures_side_by_side.md

link

For two independent side-by-side figures, you can use two minipages inside a figure enviroment; for two subfigures, I would recommend the subcaption package with its subfigure environment; here's an example showing both approaches:

\documentclass{article}
  \usepackage[demo]{graphicx}
  \usepackage{caption}
  \usepackage{subcaption}

 \begin{document}

 \begin{figure}
 \centering
 \begin{subfigure}{.5\textwidth}
   \centering
   \includegraphics[width=.4\linewidth]{image1}
   \caption{A subfigure}
   \label{fig:sub1}
 \end{subfigure}%
 \begin{subfigure}{.5\textwidth}
   \centering
   \includegraphics[width=.4\linewidth]{image1}
    \caption{A subfigure}
    \label{fig:sub2}
 \end{subfigure}
  \caption{A figure with two subfigures}
  \label{fig:test}
  \end{figure}

 \begin{figure}
 \centering
 \begin{minipage}{.5\textwidth}
   \centering
   \includegraphics[width=.4\linewidth]{image1}
   \captionof{figure}{A figure}
   \label{fig:test1}
  \end{minipage}%
 \begin{minipage}{.5\textwidth}
   \centering
   \includegraphics[width=.4\linewidth]{image1}
   \captionof{figure}{Another figure}
   \label{fig:test2}
  \end{minipage}
 \end{figure}
 \end{document}

Refer to the link at the beginning for details posted,