R markdown / bookdown - 如何在摘要下方显示关键字？

Question

我在 .Rmd 文件中定义了关键字，但它们在输出 PDF 中不可见。

当前输出

预期结果

当前.Rmd

.Rmd 文件的第一行如下所示：

---
title: "No keywords within the output file"
abstract: "This is sample text for abstract. Generally speaking, I would like to show keywords list below an abstract (as in case of the linked example)"
keywords: "keywordA, keywordB"
author: "Mateusz Kędzior"
output: 
  bookdown::pdf_document2:
    keep_tex: true
    number_sections: yes
    toc: false
base_format: rticles::elsevier_article
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```

## Elsevier article

This is an R Markdown document.

I'm trying to prepare an Elsevier article.

Answer 1

我想知道 base_format 是否真的在你的示例中做了任何工作（输出看起来与没有 base_format 一样）。由于 base_format 是 pdf_book 的参数，请考虑将 YAML header 更改为

---
title: "No keywords within the output file"
author: 
- name: "Mateusz Kędzior"
abstract: "This is sample text for abstract. Generally speaking, I would like to show keywords list below an abstract (as in case of the linked example)"
keywords: "keywordA, keywordB"
output: 
  bookdown::pdf_book:
    keep_tex: true
    number_sections: yes
    toc: false
    base_format: rticles::elsevier_article
---

这会为您提供以下输出：

或者，在摘要中添加关键字：

    abstract: "This is sample text for abstract. Generally speaking, I would like
 to show keywords list below an abstract (as in case of the linked example) \par
 \textbf{Keywords:} a, b"

得到

R markdown / bookdown - 如何在摘要下方显示关键字？

R markdown / bookdown - how to display keywords below an abstract?

r

knitr

bookdown