我正在使用森林准备投影仪演示文稿和流程图。出于某种原因，它建议额外}或问题\end{frame}。以下是代码：
\documentclass[12pt,a4paper]{beamer}
\usepackage[latin1]{inputenc}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{forest}
\usetheme{CambridgeUS}
\usefonttheme{professionalfonts}
\author{Dr Vaibhav Banait, }
\title{Hepatitis B and C (For healthcare workers)}
\begin{document}
\begin{frame}
\centering
\begin{forest}
[Exposure to infected blood
[acute hepatitis b
[recovery]
[Carrier state]
[Chronic hepatitis B
[Cirrhosis][Liver Cancer]
]]
[acute hepatitis c
[recovery]
[chronic hepatitis c
[Cirrhosis][Liver Cancer]
]
]
]
\end{forest}
\end{frame}
\end{document}
答案1
forest该问题是由于环境中留下的空行造成的：
[Cirrhosis][Liver Cancer]
]
]
]
删除它，一切正常。
完整的示例（由于树不适合框架，因此已被缩放）：
\documentclass{beamer}
\usepackage[latin1]{inputenc}
\usepackage{amsmath}
\usepackage{lmodern}
\usepackage{amssymb}
\usepackage{forest}
\usetheme{CambridgeUS}
\usefonttheme{professionalfonts}
\author{Dr Vaibhav Banait, }
\title{Hepatitis B and C (For healthcare workers)}
\begin{document}
\begin{frame}
\centering
\scalebox{0.825}{
\begin{forest}
[Exposure to infected blood
[acute hepatitis b
[recovery]
[Carrier state]
[Chronic hepatitis B
[Cirrhosis][Liver Cancer]
]]
[acute hepatitis c
[recovery]
[chronic hepatitis c
[Cirrhosis][Liver Cancer]
]
]
]
\end{forest}
}
\end{frame}
\end{document}
结果：
