Can I generate latex code from R and then render it in the same document?

[mattysimonson]

Description

Suppose I have r code that generates a table in latex such as

library(xtable)
data(tli)
xtable(tli[1:10, ])

How can I get this table (rather than the code) to show up in my Quarto document? Do I have to save it as a separate .tex file and then load it back in?

[mcanouil]

The issue is that xtable does not actually returns the code but prints it.
This is pretty extensively "documented" online, see https://duckduckgo.com/?q=xtable+rmarkdown.

Also documented online, you need to tell knitr the print output needs to be read as is.

---
format: pdf
---

```{r}
#| output: asis
library(xtable)
data(tli)
xtable(tli[1:10, ])
```

[cderv]

Additionally, A trick to set the printing method for xtable for a whole document without needing the options in each chunk

```{r}
#| include: false
library(knitr)
.S3method("knit_print", "xtable", function(x, ...) {
  knitr::raw_latex(print(x, print.results = FALSE))
})
```

This can be adapted to account for different output format.

xtable is among the few package that do not have some nice knit_print method to account for knitr. But its print() method as a few options that can be tweaked to customize output (https://github.com/cran/xtable/blob/master/R/print.xtable.R)

Hope it helps