Algorithmicx - 不同高度的 2 列子算法的标题对齐

Question

algpseduocode我有 2 个子算法需要使用包中的布局并排放置（2 列）algorithmicx。由于我需要在以下文本段落中分别引用它们，同时还要有一个共同的标题，所以我选择了包subfigure提供的环境subcaption。

问题是，虽然我希望算法本身（内容）垂直居中对齐，但我需要它们各自的标题也对齐。但目前我不知道该怎么做。该图说明了当前的对齐方式和标题的要求位置。

这是MWE制作这个

\documentclass{article}
\usepackage{subcaption}
\usepackage{algorithm}
\usepackage{algpseudocode}
\usepackage[margin=1cm]{geometry}

\begin{document}

\begin{figure}[h]
    \centering
    \fbox{
        \begin{subfigure}[c]{0.50\textwidth}
            \begin{algorithmic}[0]
                \Procedure{Main}{}
                    \State configure interrupts
                    \State enable timers
                    \State $\vdots$
                    \While{\textproc{True}} \Comment{until shutdown}
                        \State background task \#1 \Comment{safety checks}
                        \State background task \#2
                        \State $\vdots$
                        \If{Calibrate}
                            \Function{doCalibration}{$x$}
                                \State subroutine for calibration
                                \State $\vdots$
                            \EndFunction
                        \EndIf
                        \State $\vdots$
                        \State background task \#$n$ \Comment{serial comm.}
                    \EndWhile
                \EndProcedure
            \end{algorithmic}
            \caption{background processes}
            \label{subfig:bgRTprocess}
        \end{subfigure}
        \hfill
        \begin{subfigure}[c]{0.47\textwidth}
            % \centering
            \raggedright
            \begin{algorithmic}[0]
                \Function{ISR}{$ $}
                    \State read sensor data from ADC
                    \State $\vdots$
                    \State initialise model
                    \Function{computeControl}{$x$}
                        \State evalute modeleqns
                        \State $\vdots$
                    \EndFunction
                    \State $\vdots$
                    \State write control output to DAC
                    \vfill
                \EndFunction
            \end{algorithmic}
            \caption{foreground process}
            \label{subfig:fgRTprocess}
        \end{subfigure}
    }
    \caption{RT software architecture of a microcontroller}
    \label{fig:basicRTCsoftwarearch}
\end{figure}

\end{document}

我怎样才能实现这个期望的位置？

Answer 1

\vspace{3.75\baselineskip}为了简化解决方案，我建议通过在环境后添加类似的内容algorithmic并使用[b]ottom 对齐来将右侧算法提升到位subfigure：

\documentclass{article}

\usepackage{subcaption}
\usepackage{algorithm}
\usepackage{algpseudocode}
\usepackage[margin=1cm]{geometry}

\begin{document}

\begin{figure}
  \centering
  \fbox{
    \begin{subfigure}[b]{0.50\textwidth}
      \begin{algorithmic}[0]
        \Procedure{Main}{}
          \State configure interrupts
          \State enable timers
          \State $\vdots$
          \While{\textproc{True}} \Comment{until shutdown}
            \State background task \#1 \Comment{safety checks}
            \State background task \#2
            \State $\vdots$
            \If{Calibrate}
              \Function{doCalibration}{$x$}
                \State subroutine for calibration
                \State $\vdots$
              \EndFunction
            \EndIf
            \State $\vdots$
            \State background task \#$n$ \Comment{serial comm.}
          \EndWhile
        \EndProcedure
      \end{algorithmic}
      \caption{background processes}
    \end{subfigure}
    \hfill
    \begin{subfigure}[b]{0.47\textwidth}
      \begin{algorithmic}[0]
        \Function{ISR}{$ $}
          \State read sensor data from ADC
          \State $\vdots$
          \State initialise model
          \Function{computeControl}{$x$}
            \State evalute modeleqns
            \State $\vdots$
          \EndFunction
          \State $\vdots$
          \State write control output to DAC
        \EndFunction
      \end{algorithmic}
      \vspace{3.75\baselineskip}
      \caption{foreground process}
    \end{subfigure}
  }
  \caption{RT software architecture of a microcontroller}
\end{figure}

\end{document}

另一种方法（为了实现完美的垂直对齐）是将较大的内容放在一个可以测量的框中，然后将较小的框移动到差值的一半的位置。最终结果只是垂直对齐的微小改进。

---

这是替代方法 - 将每个算法存储在一个可以测量的盒子中。这样您就可以将较小的算法移动到位：

\documentclass{article}

\usepackage{subcaption}
\usepackage{algorithm}
\usepackage{algpseudocode}
\usepackage[margin=1cm]{geometry}

\newsavebox{\algboxA}
\newsavebox{\algboxB}

\begin{document}

\begin{figure}

  \savebox{\algboxA}{%
    \begin{minipage}[b]{0.48\linewidth}
      \begin{algorithmic}[0]
        \Procedure{Main}{}
          \State configure interrupts
          \State enable timers
          \State $\vdots$
          \While{\textproc{True}} \Comment{until shutdown}
            \State background task \#1 \Comment{safety checks}
            \State background task \#2
            \State $\vdots$
            \If{Calibrate}
              \Function{doCalibration}{$x$}
                \State subroutine for calibration
                \State $\vdots$
              \EndFunction
            \EndIf
            \State $\vdots$
            \State background task \#$n$ \Comment{serial comm.}
          \EndWhile
        \EndProcedure
      \end{algorithmic}
    \end{minipage}%
  }%
  \savebox{\algboxB}{%
    \begin{minipage}[b]{0.48\linewidth}
      \begin{algorithmic}[0]
        \Function{ISR}{$ $}
          \State read sensor data from ADC
          \State $\vdots$
          \State initialise model
          \Function{computeControl}{$x$}
            \State evalute modeleqns
            \State $\vdots$
          \EndFunction
          \State $\vdots$
          \State write control output to DAC
        \EndFunction
      \end{algorithmic}
    \end{minipage}%
  }

  \fbox{%
    \begin{subfigure}[b]{0.48\textwidth}
      \usebox{\algboxA}
      \caption{background processes}
    \end{subfigure}
    \hfill
    \begin{subfigure}[b]{0.48\textwidth}
      \raisebox{\dimexpr.5\ht\algboxA-.5\ht\algboxB}{%
        \usebox{\algboxB}%
      }
      \caption{foreground process}
    \end{subfigure}
  }
  \caption{RT software architecture of a microcontroller}
\end{figure}

\end{document}