在命令行上使用参数运行RMarkdown

问题描述

我正在尝试从命令行终端运行Rmarkdown文件( myfile.Rmd ).该文件需要带一个参数才能起作用.我们可以以这个简单的文件为例:

I'm trying to run a Rmarkdown file (myfile.Rmd) from the command line terminal. This file needs to take an argument to work. We can use this simple file as an example:

---
title: "Simple example"
output:
  pdf_document: default
---

```{r read_arg, include=FALSE}
args = commandArgs(TRUE)
VAR = args[1]
```

```{r show_var}
VAR
```

因此，首先，是否可以像读取Rscripts一样通过读取参数来运行Rmarkdown文件?我的意思是，不是按照此问题中所述读取输入文件.

So, first of all, is it possible to run a Rmarkdown file by reading arguments as done for Rscripts? I mean, not by reading input files as described in this question.

如果是，该怎么办?我希望该作品此处曾经运行过Rmarkdown文件对我有用，但这不是因为参数.我正在尝试运行类似的内容:

If so, how can it be done? I hope that the piece of work here used to run a Rmarkdown file worked for me, but it doesn't because of the argument. I'm trying to run something like:

Rscript -e "rmarkdown::render('myfile.Rmd myarg')"

编辑:但它出现以下错误:

But it gives the following error:

有什么想法吗?谢谢！

推荐答案

添加 myarg 对象作为参数是一种方法:

Adding the myarg object as a parameter is the way to go:

Rscript -e"rmarkdown :: render('example.Rmd'，params = list(args = myarg))"

然后将参数添加到您的 Rmd 文件中:

And then add the parameter to your Rmd file:

---
title: "Simple example"
output:
  pdf_document: default
params:
  args: myarg
---

此处有关参数化报告的文档: https://rmarkdown.rstudio.com/developer_parameterized_reports.html

Documentation on parameterized reports here: https://rmarkdown.rstudio.com/developer_parameterized_reports.html

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