Knitr:opts_chunk $ set()在Rscript命令中不起作用 [英] Knitr: opts_chunk$set() not working in Rscript command

问题描述

我正在使用knitr从Rmd创建一个markdown文件，并且在.Rmd脚本的顶部设置了以下选项以隐藏所有结果和绘图:

I'm using knitr to create a markdown file from Rmd and I have the following option set at the top of my .Rmd script to hide all results and plots:

```{r, echo=FALSE}
opts_chunk$set(results="hide", fig.show="hide")
```

当我在RStudio中单击编织HTML"按钮时，此方法有效-我得到的输出中没有结果和图形.但是，如果我从命令行运行:

When I hit the Knit HTML button in RStudio, this works - I get output without the results and figures. But if I run from the command line:

Rscript -e 'knitr::knit("myfile.Rmd")'

似乎未读取opts_chunk$set()行，并且在.md输出中获得了结果和图.我通过在Rscript命令中指定以下选项来解决此问题:

It appears the opts_chunk$set() line isn't read, and I get results and plots in my .md output. I've worked around the problem by specifying these options in the Rscript command:

Rscript -e 'library(knitr); opts_chunk$set(results="hide", fig.show="hide"); knit("myfile.Rmd")'

但是我宁愿让所有选项都从我正在使用的文件中读取，而不是在命令行中指定.在命令行中使用Rscript knit进行操作时，如何在.Rmd文件中读取选项?

But I'd rather keep all the options read from the file I'm using rather than specified at the command line. How do I get the options read in the .Rmd file when kniting with Rscript at the command line?

谢谢.

推荐答案

我认为您需要添加

library("knitr")

(该块(您可能要在该块的块选项中设置message=FALSE).

to the chunk (you might want to set message=FALSE in the chunk options for that chunk).

问题在于，当您这样做

Rscript -e 'knitr::knit("myfile.Rmd")'

您实际上并没有附加knitr软件包，这意味着它不在函数的搜索路径中，这意味着R找不到opts_chunk对象.

you're not actually attaching the knitr package, which means it isn't in the search path for functions, which means that R can't find the opts_chunk object.

• 使用knitr::opts_chunk可能也可以...
• 如您所建议，Rscript -e 'library("knitr"); knit("myfile.Rmd")'

• Using knitr::opts_chunk might work too ...
• as you suggested, so does Rscript -e 'library("knitr"); knit("myfile.Rmd")'

当您单击RStudio中的按钮时，RStudio将在运行knit()的环境中自动加载knitr.

When you click the button in RStudio, RStudio automatically loads knitr in the environment in which it runs knit().

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