How to change plot width for a Julia plot?

[sje30]

Hi,

I have the following example that I compile with quarto render f.qmd

---
title: "test plot"
author: "SJE"
format:
  beamer:
    keep-tex: true
---

## Test slide

* this is a test slide

* with some points 

* example plot below

  
```{julia} 
#| fig-width: 1
using Plots
plot([1:10])
```

I'd like to make the plot smaller so that it fits on the page, but what I get is a plot that overflows:

My workaround for now is to do something like this in the yaml header:

format:
  beamer:
    header-includes: |
      \setkeys{Gin}{width=8cm,height=6cm,keepaspectratio}

but that obviously sets the figure size for all figures.

[sje30]

p.s. examples of these can be found at:
https://github.com/Nick-Gale/2022_Scientific_Programming_CamCompBio/tree/main/Lectures

see lecture 4 for examples of plotting.

[sje30]

possibly related: rstudio/rstudio#11708. (for R code)

[cscheid]

Does

```{julia}
#| fig-width: 4in
...
```

not work?

[sje30]

not for me, I'm afraid. Here's what I tried, and the resulting .tex snippet and pdf -- no sign of images being rescaled.

---
title: "test plot"
author: "SJE"
format:
  beamer:
    keep-tex: true
---

## Test slide

* this is a test slide

* with some points 

* example plot, trying fig-width: 1in

  
```{julia} 
#| fig-width: 1in
using Plots
plot([1:10])
```

\def\maxwidth{\ifdim\Gin@nat@width>\linewidth\linewidth\else\Gin@nat@width\fi}
\def\maxheight{\ifdim\Gin@nat@height>\textheight\textheight\else\Gin@nat@height\fi}
\makeatother
% Scale images if necessary, so that they will not overflow the page
% margins by default, and it is still possible to overwrite the defaults
% using explicit options in \includegraphics[width, height, ...]{}
\setkeys{Gin}{width=\maxwidth,height=\maxheight,keepaspectratio}

...


\begin{frame}{Test slide}
\protect\hypertarget{test-slide}{}
\begin{itemize}
\item
  this is a test slide
\item
  with some points
\item
  example plot, trying fig-width: 1in
\end{itemize}

\includegraphics{t2_files/figure-beamer/cell-2-output-1.pdf}
\end{frame}

[cscheid]

Ok. I can reproduce this locally. I don't understand what's going wrong, though, because we are supposed to be communicating widths and heights to julia in setup.jl.

In the meantime, you can force the sizing computation yourself by passing a size parameter to plot(); I believe it takes pixels as the size, and PDF assumes 96 ppi. So

plot([1:10], (192, 192))

would make a 2in x 2in plot.

[sje30]

Thanks, this is a good workaround, and works for me.

---
title: "test plot"
author: "SJE"
format:
  beamer:
    keep-tex: true
---

## Test slide

* this is a test slide

* with some points 

* example plot, with explicit size=(a,b)

  
```{julia} 
using Plots
plot([1:10], size=(200,100))
```

[cscheid]

Ok, so this workaround turns out to be the currently recommended solution for the entire jupyter ecosystem. You can still configure width and height on a global level in the YAML metadata. But per-cell configuration is not supported in julia or python cells. See #3155.