[R] Can someone please have a look at this query on stackoverflow?

[Ashim Kapoor]

Dear Olivier,

Many thanks for your reply.

Very cool.

You know what I thought ? I thought you had modified the A4 sheet size
to compute the paperheight and paperwidth ?

I wonder if that's another way of proceeding.

Best,
Ashim

On Sat, Nov 18, 2023 at 12:51 PM Olivier Crouzet
<olivier.crouzet using univ-nantes.fr> wrote:
>
> Dear Ashim,
>
> these are documented in the LaTeX 'geometry' package (see for example
> on CTAN: https://ctan.org/pkg/geometry). As I added in my response on
> Stackoverflow, several parts in the RMarkdown header actually concern
> information that are processed by LaTeX to actually generate the PDF,
> among which the 'geometry' line. For someone who is used to working with
> LaTeX, it is relatively natural to 'identify' LaTeX options in these
> lines even though they are not structured exactly this way in a LaTeX
> document (but their names are the same).
>
> Concerning the choice for these specific numbers, it is relatively
> arbitrary. I've been doing this on LaTeX for years when I want to
> generate slides without using the 'beamer' document class and the
> things to take into account are:
>
> - These dimensions express the physical sizes of the pdf page (in a
> sense, what their size would be if you print the document without
> adapting to the paper in your printer)
> - If these sizes are reduced... the relative font size will increase
> because LaTeX will project the same font on a smaller virtual paper,
> - And if these sizes are increased... the relative font size will
> decrease because LaTeX will project the same font on a larger
> virtual paper,
> - I processed starting from 16x9cm sizes, resp. for paperwidth and
> paperheight, and estimated that the fonts were too large to my taste,
> then doubled them and felt that the fonts were too small for slides,
> then I ended up trying multiplying 16x9cm by a factor of 1.5, which
> gave me 24x13.5cm and I found it was ok.
> - But one may vary these sizes arbitrary (even using smaller
> steps and ratios differing from 16/9) depending on the aims to be
> reached.
> - It is also possible to specify different units (pt = points, in =
> inches...)
>
> Yours.
> Olivier.
>
> On Sat, 18 Nov 2023 09:53:19 +0530 Ashim Kapoor <ashimkapoor using gmail.com>
> wrote:
>
> > Dear Olivier,
> >
> > Many thanks for your reply.
> >
> > This works well for me.
> >
> > How did you come up with the pagewidth / pageheight numbers?  I do
> > understand that their ratio = 16:9,
> > but how did you choose these numbers?
> >
> > Best Regards,
> > Ashim
> >
> > On Fri, Nov 17, 2023 at 9:25 PM Olivier Crouzet
> > <olivier.crouzet using univ-nantes.fr> wrote:
> > >
> > > Dear Ashim,
> > >
> > > I don't think the aspectratio is appropriate in this context because
> > > it would imply that the beamer (LaTeX) class is used but you're
> > > actually using the article (LaTeX) class.
> > >
> > > You may use specifications of the geometry package rather than
> > > specifying options to the class:
> > >
> > > e.g. replace your current header:
> > >
> > > ---
> > > title: "Testing landscape and aspect ratio"
> > > output:
> > >   pdf_document:
> > >     number_sections: true
> > > classoption:
> > >   - landscape
> > >   - "aspectratio=169"
> > > header-includes:
> > >    - \usepackage{dcolumn}
> > > documentclass: article
> > > geometry: margin=1.5cm
> > > ---
> > >
> > > with this one:
> > >
> > > ---
> > > title: "Testing landscape and aspect ratio"
> > > output:
> > >   pdf_document:
> > >     number_sections: true
> > > header-includes:
> > >    - \usepackage{dcolumn}
> > > documentclass: article
> > > geometry: margin=1.5cm, paperwidth=24cm, paperheight=13.5cm
> > > ---
> > >
> > > Of course, you may change the exact dimensions and it will impact
> > > the relative font sizes. I've tested it and it generates what you
> > > want.
> > >
> > > Yours.
> > > Olivier.
> > >
> > >
> > >
> > >
> > >
> > >  On Tue, 14 Nov 2023 10:03:23
> > > +0530 Ashim Kapoor <ashimkapoor using gmail.com> wrote:
> > >
> > > > Dear all,
> > > >
> > > > I have posted a query which has received a response but that is
> > > > not working on my computer.
> > > >
> > > > Here is the query:
> > > >
> > > > https://stackoverflow.com/questions/77387434/pdf-from-rmarkdown-landscape-and-aspectratio-169
> > > >
> > > > Can someone please help me ?
> > > >
> > > > Best Regards,
> > > > Ashim
> > > >
> > > > ______________________________________________
> > > > 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.
> > >
> > >
> > > --
> > >   Olivier Crouzet, PhD
> > >   http://olivier.ghostinthemachine.space
> > >   /Maître de Conférences/
> > >   @LLING - Laboratoire de Linguistique de Nantes
> > >     UMR6310 CNRS / Université de Nantes
> > >
> > > ______________________________________________
> > > 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.
>
>
> --
>   Olivier Crouzet, PhD
>   http://olivier.ghostinthemachine.space
>   /Maître de Conférences/
>   @LLING - Laboratoire de Linguistique de Nantes
>     UMR6310 CNRS / Université de Nantes
>
>