Re: [R] conditionally disable evaluation of chunks in Rmarkdown...
On Tue, Nov 10, 2015 at 9:00 AM, Yihui Xie wrote:
> The short answer is you cannot. Inline R code is always evaluated.
> When it is not evaluated, I doubt if your output still makes sense,
> e.g. "The value of x is `r x`." becomes "The value of x is ." That
> sounds odd to me.
>
> If you want to disable the evaluate of inline code anyway, you may use
> a custom function to do it. e.g.
>
> cond_eval = function(x) {
> if (isTRUE(knitr::opts_chunk$get('eval'))) x
> }
>
> Then `r cond_eval(x)` instead of `r x`.
>
> Regards,
> Yihui
> --
> Yihui Xie
> Web: http://yihui.name
>
>
> On Tue, Nov 10, 2015 at 4:40 AM, Witold E Wolski wrote:
>> I do have an Rmd where I would like to conditionally evaluate the second
>> part.
>>
>> So far I am working with :
>>
>> ```{r}
>> if(length(specLibrary@ionlibrary) ==0){
>> library(knitr)
>> opts_chunk$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?
Just a FYI and maybe/maybe not a option for you; this is one of the
use cases where RSP (https://cran.r-project.org/package=R.rsp) is
handy because it does not require that code snippets (aka "code
chunks" as originally defined by weave/tangle literate programming) to
contain complete expressions. With RSP-embedded documents, you can do
things such
<% if (length(specLibrary@ionlibrary) > 0) { %>
[... code and text blocks to conditionally include ...]
<% } # if (length(specLibrary@ionlibrary) > 0) %>
or include from a separate file, e.g.
<% if (length(specLibrary@ionlibrary) > 0) { %> <%@include
file="extras.md.rsp"%> <% } %>
You can also use loops over a mixture of code and text blocks etc.
Depending on when 'specLibrary@ionlibrary' gets assigned, you could
preprocess you R Markdown file with RSP, but for this to work out of
the box you basically need to know the value
length(specLibrary@ionlibrary) before your R Markdown code is
evaluated, i.e. before you compile the Rmd file. Your build pipeline
would then look something like:
rmd <- R.rsp::rfile("report.rmd.rsp")
rmarkdown::render(rmd)
/Henrik
(author of R.rsp)
>>
>> regards
>>
>>
>>
>> --
>> Witold Eryk Wolski
>
> __
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] conditionally disable evaluation of chunks in Rmarkdown...
The short answer is you cannot. Inline R code is always evaluated.
When it is not evaluated, I doubt if your output still makes sense,
e.g. "The value of x is `r x`." becomes "The value of x is ." That
sounds odd to me.
If you want to disable the evaluate of inline code anyway, you may use
a custom function to do it. e.g.
cond_eval = function(x) {
if (isTRUE(knitr::opts_chunk$get('eval'))) x
}
Then `r cond_eval(x)` instead of `r x`.
Regards,
Yihui
--
Yihui Xie
Web: http://yihui.name
On Tue, Nov 10, 2015 at 4:40 AM, Witold E Wolski wrote:
> I do have an Rmd where I would like to conditionally evaluate the second part.
>
> So far I am working with :
>
> ```{r}
> if(length(specLibrary@ionlibrary) ==0){
> library(knitr)
> opts_chunk$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
__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] conditionally disable evaluation of chunks in Rmarkdown...
Well, strictly speaking knitr and rmarkdown are a contributed packages and the
official contact for any contributed package is found via the maintainer()
function. The Posting Guide indicates that R-help should only be used as a
backup if that avenue is a dead end.
To be fair to the OP, there are a lot of useful contributed packages that get
discussed here anyway. But Bert is right that if there is a forum more
appropriate for a contributed package then it should be preferred and any
question posed here should mention any dead ends encountered and good
netiquette would be to link to any publicly-visible record of those attempts.
---
Jeff NewmillerThe . . Go Live...
DCN:Basics: ##.#. ##.#. Live Go...
Live: OO#.. Dead: OO#.. Playing
Research Engineer (Solar/BatteriesO.O#. #.O#. with
/Software/Embedded Controllers) .OO#. .OO#. rocks...1k
---
Sent from my phone. Please excuse my brevity.
On November 10, 2015 6:44:16 AM PST, Bert Gunter wrote:
>Strictly speaking, wrong email list.
>
>Markdown is R Studio software, and you should post on their support
>site.
>
>Cheers,
>Bert
>
>
>Bert Gunter
>
>"Data is not information. Information is not knowledge. And knowledge
>is certainly not wisdom."
> -- Clifford Stoll
>
>
>On Tue, Nov 10, 2015 at 2:40 AM, Witold E Wolski
>wrote:
>> 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@ionlibrary) ==0){
>> library(knitr)
>> opts_chunk$set(eval=FALSE, message=FALSE, echo=FALSE)
>> }
>> ```
>>
>> Which disables the evaluation of subsequent chunks.
>>
>> However my RMD file contains also these kind of snippets : `r `
>>
>> How do I disable them?
>>
>> regards
>>
>>
>>
>> --
>> Witold Eryk Wolski
>>
>> __
>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>
>__
>R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
>https://stat.ethz.ch/mailman/listinfo/r-help
>PLEASE do read the posting guide
>http://www.R-project.org/posting-guide.html
>and provide commented, minimal, self-contained, reproducible code.
__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] conditionally disable evaluation of chunks in Rmarkdown...
Strictly speaking, wrong email list.
Markdown is R Studio software, and you should post on their support site.
Cheers,
Bert
Bert Gunter
"Data is not information. Information is not knowledge. And knowledge
is certainly not wisdom."
-- Clifford Stoll
On Tue, Nov 10, 2015 at 2:40 AM, Witold E Wolski wrote:
> I do have an Rmd where I would like to conditionally evaluate the second part.
>
> So far I am working with :
>
> ```{r}
> if(length(specLibrary@ionlibrary) ==0){
> library(knitr)
> opts_chunk$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
>
> __
> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
[R] conditionally disable evaluation of chunks in Rmarkdown...
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@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
__
R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
