如何从Knitr访问Yaml元数据 [英] how to access yaml metadata from knitr

问题描述

knitr是否知道YAML数据的值，例如title:或date:或some_custom_field:正在编译带有YAML标头的rmarkdown文档时?

Does knitr know the value of YAML data e.g. title: or date: or some_custom_field: while it is compiling an rmarkdown doc with a YAML header?

我希望能够做到这一点(伪代码)

I would like to be able to do this (pseudocode)

---
title: my title
---

The title of this document is `r knitrs_yaml_array("title")`

推荐答案

以list(title = ...)形式的列表形式存储在rmarkdown::metadata中.

That is stored in rmarkdown::metadata as a list of the form list(title = ...).

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