One option is to use kable_styling
from the kableExtra
package. The option latex_options="scale_down"
will fit the table within the paper margins. Seethe vignette for detailed examples on all of the formatting options.
---
output: pdf_document
---
```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = FALSE)
library(knitr)
library(kableExtra)
```
```{r}
kable(cbind(mtcars[1:5,], mtcars[1:5,]))
```
```{r}
kable(cbind(mtcars[1:5,], mtcars[1:5,]), format="latex", booktabs=TRUE) %>%
kable_styling(latex_options="scale_down")
```
Note if you are using longtable, this answer says,
since longtable doesn't support resizebox, you cannot use the "scale_down" option in latex_options.
However, they suggested using font_size, eg,
kable(df, "latex", longtable = T, booktabs = T) %>%
kable_styling(font_size = 7)
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