☰

讓公式從同一點開始

tag-icon • tag-icon math-mode align amsmath enumerate
讓公式從同一點開始

我想列出一些我已經完成的公式，如下所示：

\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}

問題是我想讓這些x_t從同一點開始。有誰知道如何實現這一目標？

答案1

你可以利用amsmath的\intertext.預設情況下，這將不允許align環境中的分頁符，但如果需要，可以使其成為可能。

\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}

輸出

答案2

在此特定範例中，您還可以使用aligned我定義的\Indent巨集來控制縮排：

在此輸入影像描述

筆記：

  • 正如胡伊評論的那樣，用這種方法你不會得到方程式編號。

代碼：

\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}

相關內容