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带有垂直分隔符的两列方程块

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带有垂直分隔符的两列方程块

我在教科书和网页上看到过各种各样的例子（比如这里) 两列方程块，其中左列包含一些方程，右列包含一些关于变量含义和/或其他内容的解释。我希望将如下所示的方程分成两列，中间有一个垂直分隔符，而不涉及 minipage、Tikz 和其他类似的花哨东西。这似乎是普遍需求的东西。但我找不到它的例子。任何帮助都将不胜感激。

\begin{flalign}
z &= \frac{R\left(S_2 − S_1\right)}{2\left(S_1 + S_2\right)} + \frac{R}{2}\\
text{\scriptsize{where}}
    &\text{\scriptsize{ $R$ is the camera range,}} \nonumber\\
    &\text{\scriptsize{$S_1$ is the amount of the light pulse received, and}} \nonumber\\
    &\text{\scriptsize{$S_2$ is the amount of the light pulse blocked \cite{medina1992three} \nonumber.
}}
\end{flalign}

我正在使用scrbook文档类。

答案1

您可以使用|分隔符和数组

% arara: pdflatex

\documentclass{scrbook}
\usepackage{blindtext}
\usepackage{mathtools}
\usepackage{array}

\begin{document}
\blindtext
\begin{equation}
    z = \frac{R(S_2 − S_1)}{2(S_1 + S_2)} + \frac{R}{2} \quad \left|\quad\begin{array}{r@{\ }>$l<$}
    R   & is the amount of the light pulse received, and\\
    S_1 & is the amount of the light pulse received, and\\
    S_2 & is the amount of the light pulse blocked [MED92]\\
\end{array}\right.
\end{equation}
\begin{equation}
    z = \frac{R(S_2 − S_1)}{2(S_1 + S_2)} + \frac{R}{2} \quad \left|\quad\begin{array}{>$l<$}
    $R$ is the amount of the light pulse received, and\\
    $S_1$ is the amount of the light pulse received, and\\
    $S_2$ is the amount of the light pulse blocked [MED92]\\
\end{array}\right.
\end{equation}
\blindtext
\end{document}

在此处输入图片描述

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