[R] Plots in ioslides and R markdown

[Duncan Murdoch]

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)
> |> >```
>