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parseLatex

The goal of parseLatex is to provide a parser for a subset of LaTeX syntax that is more complete than what is handled by the tools::parseLatex() parser.

Perhaps some day it will handle all LaTeX inputs, but that’s not likely. For now, I’m aiming to handle anything that knitr::kable() and the kableExtra functions will produce, plus related code.

A website describing the current state is here: https://dmurdoch.github.io/parseLatex/ .

Installation

You can install the development version of parseLatex from GitHub with:

# install.packages("pak")
pak::pak("dmurdoch/parseLatex")

Example

This is a basic example.

library(parseLatex)
library(kableExtra)
latex <- kbl(mtcars[1:2, 1:2], format = "latex")
cat(latex)
#> 
#> \begin{tabular}[t]{l|r|r}
#> \hline
#>   & mpg & cyl\\
#> \hline
#> Mazda RX4 & 21 & 6\\
#> \hline
#> Mazda RX4 Wag & 21 & 6\\
#> \hline
#> \end{tabular}
parsed <- parseLatex(latex)
# This is a blank followed by a table; drop the blank
table <- parsed[[find_env(parsed, "tabular")]]
# Get the alignment options from the content
brace_options(get_contents(table))
#> {l|r|r}
tableCell(table, 2,2) # The title counts!
#>  21
tableCell(table, 2,2) <- "Changed!"
table
#> ENVIRONMENT: \begin{tabular}[t]{l|r|r}
#> \hline
#>   & mpg & cyl\\
#> \hline
#> Mazda RX4 & Changed! & 6\\
#> \hline
#> Mazda RX4 Wag & 21 & 6\\
#> \hline
#> \end{tabular}

To-do list

• Possibly add class for table objects, and implement indexing and subsetting on that class.
• See what kableExtra does with tables, and try to make that easier.
• Do something with math environments?

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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