Knitr: opts_chunk$set() not working in Rscript command

Question

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, ec         


        

Answer 1

I think you need to add

library("knitr")

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

The problem is that when you do

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

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.

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

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