如何在左、右、上显示多幅图像？

Question

基本上我想要一个如下图所示的图：

但是，我可以把左边的放右边，如何添加上边的呢？

\documentclass{article}
\usepackage[margin=0.5in]{geometry}
\usepackage[utf8]{inputenc}
\usepackage{textcomp}
\usepackage{pgfplots}
\usepackage{subcaption}

\begin{document}


\begin{figure}[ht]
\begin{subfigure}{.5\textwidth}
  \centering
  % include first image
  \includegraphics[width=.5\linewidth]{image_file_name}  
  \caption{Put your sub-caption here}
  \label{fig:sub-first}
\end{subfigure}
\begin{subfigure}{.5\textwidth}
  \centering
  % include second image
  \includegraphics[width=.5\linewidth]{image_file_name}  
  \caption{Put your sub-caption here}
  \label{fig:sub-second}
\end{subfigure}
\caption{Put your caption here}
\label{fig:fig}
\end{figure}

\end{document}

我当前的输出：

Answer 1

只需添加第三张图片...或者我错过了什么？

\documentclass{article}
\usepackage[margin=0.5in]{geometry}
\usepackage[utf8]{inputenc}
\usepackage{textcomp}
\usepackage{pgfplots}
\usepackage{subcaption}

\begin{document}


    \begin{figure}[ht]
        \begin{subfigure}{\textwidth}
            \centering
            % include first image
            \includegraphics[width=.25\linewidth]{example-image-a}  
            \caption{Put your sub-captionA here}
            \label{fig:sub-firstA}
        \end{subfigure}
        \begin{subfigure}{.5\textwidth}
            \centering
            % include first image
            \includegraphics[width=.5\linewidth]{example-image-b}  
            \caption{Put your sub-captionB here}
            \label{fig:sub-first}
        \end{subfigure}
        \begin{subfigure}{.5\textwidth}
            \centering
            % include second image
            \includegraphics[width=.5\linewidth]{example-image-c}  
            \caption{Put your sub-captionC here}
            \label{fig:sub-second}
        \end{subfigure}
        \caption{Put your caption here}
        \label{fig:fig}
    \end{figure}

\end{document}
\end{document}

更新 图像之间的空间更小

\documentclass{article}
\usepackage[margin=0.5in]{geometry}
\usepackage[utf8]{inputenc}
\usepackage{textcomp}
\usepackage{pgfplots}
\usepackage{subcaption}

\begin{document}


    \begin{figure}[ht]
        \begin{subfigure}{\textwidth}
            \centering
            % include first image
            \includegraphics[width=.45\linewidth]{example-image-a}   % this width should be half of the width of the other two images
            \caption{Put your sub-captionA here}
            \label{fig:sub-firstA}
        \end{subfigure}
        \begin{subfigure}{.5\textwidth} % this sets the figure to be max half the width of the page
            \centering
            % include first image
            \includegraphics[width=.9\linewidth]{example-image-b}  % this sets the image to fill 90% of the available space -> 45% of the line width in total. 
            \caption{Put your sub-captionB here}
            \label{fig:sub-first}
        \end{subfigure}
        \begin{subfigure}{.5\textwidth}
            \centering
            % include second image
            \includegraphics[width=.9\linewidth]{example-image-c}  
            \caption{Put your sub-captionC here}
            \label{fig:sub-second}
        \end{subfigure}
        \caption{Put your caption here}
        \label{fig:fig}
    \end{figure}

\end{document}

Answer 2

在此示例中，我将子图/标题的宽度缩小到图像的宽度。请注意，\hfil在两个下方子图之间放置会扩展到与相同的间隙\centering，而\hfill会将子图一直推到边缘。

\documentclass{article}
\usepackage[margin=0.5in,showframe]{geometry}
\usepackage[utf8]{inputenc}
\usepackage{textcomp}
\usepackage{pgfplots}
\usepackage{subcaption}

\begin{document}

\begin{figure}[ht]
\centering
\begin{subfigure}{.45\textwidth}
  \includegraphics[width=\linewidth]{example-image-a}  
  \caption{Put your sub-caption here}
  \label{fig:sub-first}
\end{subfigure}% ending a line with a brace adds a space
\vspace{\floatsep}% space added between consecutive floats

\begin{subfigure}{.45\textwidth}
  \includegraphics[width=\linewidth]{example-image-b}  
  \caption{Put your sub-caption here}
  \label{fig:sub-secon}
\end{subfigure}\hfil
\begin{subfigure}{.45\textwidth}
  \includegraphics[width=\linewidth]{example-image-c}  
  \caption{Put your sub-caption here}
  \label{fig:sub-third}
\end{subfigure}
\caption{Put your caption here}
\label{fig:fig}
\end{figure}

\end{document}