Does anyone know how to place a formula, a (weird) character, or words in italic within a sentence of a footnote of a table?
I'm creating a pdf file with Rmarkdown and kableExtra. But stuff like $Y_{t-1}$ or $p < .001$ (since I want the p to be italic) does not work. Or should I really learn xtable?
The trick is 1. to escape latex code and special characters four times, e.g. \\\\frac, 2. to set option escape=FALSE in footnote().
---
title: "Untitled"
output: pdf_document
---
```{r tab}
library(knitr)
library(kableExtra)
df <- data.frame(v1=rnorm(6), v2=runif(6), v3=rbinom(6, 1, .33),
row.names=LETTERS[1:6])
kable(df, "latex", align="c", booktabs=TRUE) %>%
footnote(general=c("$a^2+b^2=c^2,$",
"$\\\\sigma^2=\\\\frac{1}{n-1}\\\\sum_{i=1}^n(x_i-\\\\bar{x})^2;$",
"1,000 \\\\$;", "100\\\\%."),
number=c("Hello\ there! \\\\textit{Hello\ there!}"),
footnote_as_chunk=TRUE,
escape=FALSE)
```
Yields:
来源：https://stackoverflow.com/questions/49298953/formulas-or-symbols-in-footnotes-using-knitr-and-kableextra