How do I create a pdf figure generated by R

[olechnwin]

Description

I tried to create a pdf figure using fig-format.

---
title: "test"
format: html
editor: visual
---

```{r}
#| fig-format: pdf
plot(1 + 1)

The html has the figure. I was expecting to see a pdf figure in test_files/ but there is only png figure.

ls test_files/figure-html/
unnamed-chunk-1-1.png

How do I create a pdf figure of plot(1+1) without using pdf function?

[mcanouil]

In R, figures are handled by "graphic devices", you have to use those, see https://bookdown.org/yihui/rmarkdown-cookbook/graphical-device.html

---
title: "test"
format: html
---

```{r}
#| dev: pdf
plot(1 + 1)
```

---

You can share a Quarto document using the following syntax, i.e., using more backticks than you have in your document (usually four ````).

````qmd
---
title: "Reproducible Quarto Document"
format: html
---

This is a reproducible Quarto document using `format: html`.
It is written in Markdown and contains embedded R code.
When you run the code, it will produce a plot.

```{r}
plot(cars)
```

The end.
````

[olechnwin]

@mcanouil,

Thank you for your reply and for the tips on posting a Quarto document.

I tried using dev:pdf but the embedded figure becomes like this:

Is there a way to make it look like what it was without the box around the figure?

[mcanouil]

You can't have a pdf appears as a png in HTML.

dev accepts multiple devices, so you can make the code cell generate several image files, see https://yihui.org/knitr/options/.

[olechnwin]

Thank you! This gets me what I wanted.

```{r, dev=c("png","pdf")}
plot(1 + 1)
```

But, how do I do this with the #| ? I tried the following but it gave me an error:

```{r}
#| dev: c("png","pdf")
plot(1 + 1)
```

[cderv]

Two things:

• fig-format should work as this is an alias for dev. Though this requires latest knitr and possibly Quarto 1.4. So in the meantime using dev is fine (but this options is only working for knitr chunks in .qmd)
• You need to use YAML syntax so use List syntax when multiple item.

---
title: Hello World
---

```{r}
#| fig-format:
#|   - png
#|   - pdf
plot(1 + 1)
```

This will indeed produce a png AND a pdf file, and include only the first I believe.

[olechnwin]

Thank you so much!