[R] conditionally disable evaluation of chunks in Rmarkdown...

[Witold E Wolski]

I do have an Rmd where I would like to conditionally evaluate the second part.

So far I am working with :

```{r}
if(length(specLibrary at ionlibrary) ==0){
  library(knitr)
  opts_chunk$set(eval=FALSE, message=FALSE, echo=FALSE)
}
```

Which disables the evaluation of subsequent chunks.

However my RMD file contains also these kind of snippets : `r `

How do I disable them?

regards



-- 
Witold Eryk Wolski