[R] Double / single backticks for inline R code in an Rmarkdown file

[Ashim Kapoor]

Dear Yihui,

Thank you and Best Regards,
Ashim

On Mon, Oct 14, 2019 at 7:30 PM Yihui Xie <xie using yihui.name> wrote:

> params$data is "hawaii" in this case, so the output of
>
>   ``r params$data``
>
> is
>
>   `hawaii`
>
> The double backticks don't have any special meaning here. Only the
> inside pair of backticks (i.e. `r `) makes sense to R Markdown (or
> precisely speaking, knitr). The outside pair will be left untouched
> after knitr evaluates the inline R expression `r params$data`. After
> evaluation, there won't be double backticks. This has nothing to do
> with the left curly double quote LaTeX. The result `hawaii` will be
> converted to <code>hawaii</code> if the output format is HTML (or
> \texttt{hawaii} if the output format is LaTeX), but the extra
> backticks in the original Rmd document is completely optional. It all
> depends on whether you want to place the result in a code tag or
> command.
>
> Regards,
> Yihui
> --
> https://yihui.name
>
> On Mon, Oct 14, 2019 at 8:42 AM Jeff Newmiller <jdnewmil using dcn.davis.ca.us>
> wrote:
> >
> > No, you don't misunderstand. But you might want to be aware that
> targeting PDF output uses LaTeX which regards double backticks as a method
> of encoding a left curly double quote mark, so this error could derive from
> an incomplete adaptation of the Rmd file for HTML output even though such a
> symbol doesn't make sense there in PDF either.
> >
> > On October 14, 2019 4:35:26 AM PDT, Ashim Kapoor <ashimkapoor using gmail.com>
> wrote:
> > >Dear All,
> > >
> > >I am reading this file :-
> > >
> > >https://rmarkdown.rstudio.com/lesson-6.html
> > >
> > >My query is : In line 14 of the above file, ie.
> > >
> > >The [marmap](https://cran.r-project.org/web/packages/marmap/index.html)
> > >package provides tools and data for visualizing the ocean floor. Here
> > >is an
> > >example contour plot of marmap's ``r params$data`` dataset.
> > >
> > >Should not the phrase rparams$data be within SINGLE backticks ?
> > >
> > >Do I misunderstand?
> > >
> > >Thank you,
> > >Ashim
> > >
> > >       [[alternative HTML version deleted]]
> > >
> > >______________________________________________
> > >R-help using 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.
> >
> > --
> > Sent from my phone. Please excuse my brevity.
> >
> > ______________________________________________
> > R-help using 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.
>

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