Setting multiple extensions for figures?

[ABSOD]

Description

I am using Quarto with R. to produce a PDF document I need to insert a figure from an external file and set multiple extensions (the width of the figure and an alt-text string)
The example for figures shows this syntax:

![Elephant](elephant.png){width=4in}

Is it possible to include more than one extension, e.g.:

![Elephant](elephant.png){width=4in, fig-alt="an alternative text string"}

I have seen examples that place image-producing code in an R block, e.g.:

```{r}
#| width=4in
#| fig-alt='an alternative text string'
ggplot(something)

How would you load an external image file into a R block?

TIA

[mcanouil]

What do you call "extensions"?
What do you call "external"?

Why do you want to use an R code cell to include an image? There is no need for computations. Plain markdown is enough.

[ABSOD]

My understanding is that in this command:

![Elephant](elephant.png){width=4in}
the {width=4in} statement is the extension.

I need to set multiple parameters for the images for accessibility reasons. I need to control the size, and the alignment AND set a specific alt-text string for multiple images in the document.

How do I do this?
TIA

[ABSOD]

One more thing, I am generating multiple PDF documents in a loop. Each document will need to include different images based on the values passed to the .qmd file through the kintr parameters. I'm thinking I need to pass the image information in an R block.
Cheers

[mcanouil]

the {width=4in} statement is the extension.

That is not an "extension". That is an attribute.
An "extension" for an image is .png from your example.
Could you update the title of your post which is very misleading? Thank you.

You can add any attributes as described in the documentation, see https://quarto.org/docs/authoring/markdown-basics.html#links-images and https://quarto.org/docs/authoring/figures.html#alt-text.
Note that the names of the attributes are the ones from HTML mostly and that they are space separated (no comma).

Regarding the loop, either output markdown using cat() and output: asis or use knitr::include_graphics().