R降价/降价 - 如何在摘要下方显示关键词？

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实际上是否在您的示例中正在进行任何工作（输出在使用和不使用base_format时看起来相同）。由于base_format是pdf_book的参数，因此请考虑将您的YAML标题更改为

---
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
---

，它提供以下输出：

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"

获取