[R] Plots in ioslides and R markdown

[Jeff Newmiller]

a) Duncan, he provided sessionInfo below his reprex.

b) Patrick: you appear to be trying to use a common file to generate multiple output formats. I will caution you that I have found considerable disappointment in trying that, and suggest that you focus your efforts on one output format for each Rmd file.

c) You can add out.width="100%" and out.height="100%" to your chunk to fix the scaling problem. This method is HTML-specific... you would need different strings for LaTeX output.

d) Note that the help files for the rmarkdown output functions are often very interesting. e.g.

?rmarkdown::ioslides_presentation

On August 25, 2018 5:10:14 PM PDT, Duncan Murdoch <murdoch.duncan using gmail.com> wrote:
>On 25/08/2018 7:37 PM, Patrick Connolly wrote:
>> On Sat, 25-Aug-2018 at 07:53AM -0400, Duncan Murdoch wrote:
>> 
>> |> On 25/08/2018 6:21 AM, Patrick Connolly wrote:
>> |> >---
>> |> >title: "Barking up the wrong tree"
>> |> >author: "Patrick Connolly"
>> |> >date: "`r format(Sys.time(), '%a %d/%m/%Y %H:%M')`"
>> |> >output:
>> |> >   ioslides_presentation: default
>> |> >   slidy_presentation: default
>> |> >   beamer_presentation: default
>> |> >---
>> |> >
>> |> >```{r global_options, echo=FALSE}
>> |> >knitr::opts_chunk$set(tidy=TRUE,
>> |> >                       warning=FALSE,
>> |> >                       message=FALSE,
>> |> >                       cache=FALSE,
>> |> >                       dpi = 300)
>> |>
>> |> Drop the dpi setting and it will work fine.
>> 
>> Still doesn't avoid what I think is the issue with Cairo
>> 
>>     Error in axis(side = side, at = at, labels = labels, ...) : X11
>>    font -adobe-helvetica-%s-%s-*-*-%d-*-*-*-*-*-*-*, face 1 at size
>12
>>    could not be loaded Calls: <Anonymous> ... plot.default ->
>localAxis
>>    -> Axis -> Axis.default -> axis
>> 
>>    Execution halted
>> 
>> 
>> For interactive plotting, Rstudio plots those 6 plots on one page so
>> no issue is apparent, as it will if I use a pdf device within ESS.
>
>So use RStudio, don't use ESS.
>
>> However, when plotting interactively in ESS, a basic font is used for
>> the labels which is OK for preliminary quick look.  No error message
>> is shown, but I suspect that it is defaulting to a crude font because
>> the helvetica font is not available.
>> 
>> It appears to me that the font problem doesn't arise with Rstudio
>> unless the desired output is ioslides.  Which brings us back to the
>> issue with Cairo.  There are lots of hits when I search for
>> configuring fonts, Cairo and R but I've not found anything I can use.
>> 
>
>I don't see a font problem in MacOS.  I don't think you've stated what 
>system you are using (but I may have missed it).
>
>Duncan Murdoch
>
>> I would appreciate pointers where I can find useful information.
>> 
>> Thank you.
>> 
>> |>
>> |> Duncan Murdoch
>> |>
>> |> >```
>> |> >## 6 different Regression Trees
>> |> >
>> |> >```{r 6 different Regression Trees, echo = FALSE, messages=FALSE,
>fig.width = 7, fig.height = 5}
>> |> >
>> |> >  par(mfrow = c(2, 3))
>> |> >plot(1:10)
>> |> >plot(12:4)
>> |> >plot(seq(0, 800))
>> |> >plot(-100:-900)
>> |> >plot(12:50)
>> |> >plot(90:54)
>> |> >```
>> 

-- 
Sent from my phone. Please excuse my brevity.