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使公式从同一点开始

tag-icon • tag-icon math-mode align amsmath enumerate
使公式从同一点开始

我列出几个我做过的公式如下：

\documentclass{article}
\usepackage{amsmath}
\begin{document}

\begin{enumerate}
\item \textbf{Hommes and in 't Veld AR(1) model:}
    \begin{align}
        x_t = \frac{1}{R^*}(n_{1,t} \phi_1 + n_{2,t}\phi_2)x_{t-1} + \epsilon_t.
    \end{align}
\item \textbf{Weak trend following AR(2) model:}
    \begin{align}
        x_t = \frac{1}{R^*}((n_{1,t} \phi_1 + 1.4n_{2,t})x_{t-1} - 0.4n_{2,t}x_{t-2}) + \epsilon_t.
    \end{align}
\item \textbf{Strong trend following AR(2) model:}
    \begin{align}
        x_t = \frac{1}{R^*}((n_{1,t} \phi_1 + 2.3n_{2,t})x_{t-1} - 1.3n_{2,t}x_{t-2}) + \epsilon_t.
    \end{align}
\item \textbf{General trend following AR(2) model:}
    \begin{align}
        x_t = \frac{1}{R^*}((n_{1,t} \phi_1 + (1+\phi_3)n_{2,t})x_{t-1} - \phi_3n_{2,t}x_{t-2}) + \epsilon_t.
    \end{align}
\end{enumerate}
\end{document}

问题是我想让它们x_t从同一点开始。有人知道如何实现吗？

答案1

您可以使用amsmath。\intertext默认情况下，这将不允许在align环境中分页，但如果有必要，可以使其成为可能。

\documentclass{article}
\usepackage{amsmath}

\begin{document}
\begin{enumerate}
\item \textbf{Hommes and in 't Veld AR(1) model:}
    \begin{align}
        x_t &= \frac{1}{R^*}(n_{1,t} \phi_1 + n_{2,t}\phi_2)x_{t-1} + \epsilon_t.\\
\intertext{\item \textbf{Weak trend following AR(2) model:}}
        x_t &= \frac{1}{R^*}((n_{1,t} \phi_1 + 1.4n_{2,t})x_{t-1} - 0.4n_{2,t}x_{t-2}) + \epsilon_t.\\
\intertext{\item \textbf{Strong trend following AR(2) model:}}
        x_t &= \frac{1}{R^*}((n_{1,t} \phi_1 + 2.3n_{2,t})x_{t-1} - 1.3n_{2,t}x_{t-2}) + \epsilon_t.\\
\intertext{\item \textbf{General trend following AR(2) model:}}
        x_t &= \frac{1}{R^*}((n_{1,t} \phi_1 + (1+\phi_3)n_{2,t})x_{t-1} - \phi_3n_{2,t}x_{t-2}) + \epsilon_t.
    \end{align}
\end{enumerate}
\end{document}

输出

答案2

在这个特定的例子中，您还可以使用aligned我定义的\Indent宏来控制缩进：

在此处输入图片描述

笔记：

  • 正如 hooy 所评论的，使用这种方法你无法获得方程式数字。

代码：

\documentclass{article}
\usepackage{amsmath}

\newcommand*{\Indent}{\par\hspace*{1.0cm}}

\begin{document}

\begin{enumerate}
\item \textbf{Hommes and in 't Veld AR(1) model:}
    \Indent$\begin{aligned}
        x_t = \frac{1}{R^*}(n_{1,t} \phi_1 + n_{2,t}\phi_2)x_{t-1} + \epsilon_t.
    \end{aligned}$
\item \textbf{Weak trend following AR(2) model:}
    \Indent$\begin{aligned}
        x_t = \frac{1}{R^*}((n_{1,t} \phi_1 + 1.4n_{2,t})x_{t-1} - 0.4n_{2,t}x_{t-2}) + \epsilon_t.
    \end{aligned}$
\item \textbf{Strong trend following AR(2) model:}
    \Indent$\begin{aligned}
        x_t = \frac{1}{R^*}((n_{1,t} \phi_1 + 2.3n_{2,t})x_{t-1} - 1.3n_{2,t}x_{t-2}) + \epsilon_t.
    \end{aligned}$
\item \textbf{General trend following AR(2) model:}
    \Indent$\begin{aligned}
        x_t = \frac{1}{R^*}((n_{1,t} \phi_1 + (1+\phi_3)n_{2,t})x_{t-1} - \phi_3n_{2,t}x_{t-2}) + \epsilon_t.
    \end{aligned}$
\end{enumerate}
\end{document}

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