使用R/bookdown呈现tufte_html_book()时出错

Question

我正在尝试用R/bookdown构建一本书，在使用tufte_html_book或html_book生成html版本时，我面临着一个问题：

Error in split_chapters(output, page_builder, number_sections, split_by,  : 
  The document must start with a first (#) or second level (##) heading

这本书在gitbook或tufte_book2输出中是正确的。文档有四个文件-- index.Rmd、01-Chap1.Rmd、02-Chap2.Rmd、03-Chap3.Rmd。我喜欢保持清楚，所以index.Rmd只包含YAML头，加上一些R代码，但没有标题，这可能是导致错误的原因。是否有办法使下载的html输出类似于gitbook或pdf输出？

下面是一个可复制的小例子：

Index.Rmd：

---
title: "Tufte Handout"
subtitle: "An implementation in R Markdown"
author: "JJ Allaire and Yihui Xie"
date: "`r Sys.Date()`"
site: bookdown::bookdown_site
output:
  bookdown::tufte_html_book:
    toc: yes
bookdown::tufte_book2:
    toc: yes
---

```{r setup1, include=FALSE}

图书馆(Tufte)

在tufte版本更改时使缓存失效

Knitr：：opts_chunk$set(整洁=假，cache.extra =

packageVersion(‘tufte’)

选项(htmltools.dir.version= FALSE)

01-Chap1.Rmd

# Introduction

The Tufte handout style is a style that Edward Tufte uses in his books and handouts. Tufte's style is known for its extensive use of sidenotes, tight integration of graphics with text, and well-set typography. This style has been implemented in LaTeX and HTML/CSS^[See Github repositories [tufte-latex](https://github.com/tufte-latex/tufte-latex) and [tufte-css](https://github.com/edwardtufte/tufte-css)], respectively. We have ported both implementations into the [**tufte** package](https://github.com/rstudio/tufte). If you want LaTeX/PDF output, you may use the `tufte_handout` format for handouts, and `tufte_book` for books. 
For HTML output, use `tufte_html`. These formats can be either specified in the YAML metadata at the beginning of an R Markdown document (see an example below), or passed to the `rmarkdown::render()` function. See @R-rmarkdown more information about **rmarkdown**.

Answer 1

我在回答我自己的问题。

gitbook和(tufte_)html_book在行为上的区别在于split_by参数，即gitbook中的split_by="chapter"和(tufte_)html_book中的split_by="section"。将split_by: chapter添加到bookdown::tufte_html_book: yaml部分，可以在不出错的情况下构建bookdown::tufte_html_book:。