find_pattern: Find a pattern in deparsed items

In parseLatex: Parse 'LaTeX' Code

Find a pattern in deparsed items

Description

Searches a LaTeX2 list for text using grepl() on deparsed versions of parts of the code. It attempts to find the narrowest match(es) that lie within a single container.

Usage

find_pattern(items, pattern, ..., all = FALSE)

Arguments

items	A list of latex items.
pattern	Pattern to use in grepl().
...	Additional parameters to pass to grepl.
all	Find all matching, or the first?

Details

find_pattern() does a recursive search in the order items appear in the deparse. If the pattern matches, it attempts to narrow the match by recursing into containers and dropping earlier and later items. It should always return syntactically correct LaTeX code in which the pattern appears.

Value

find_pattern() returns a LaTeX2range object or (if all is TRUE) a list of them.

Examples

latex <- kableExtra::kbl(mtcars[1:2, 1:2], format = "latex", caption = "Sample table")
parsed <- parseLatex(latex)
parsed
loc <- find_pattern(parsed, "RX4 Wag", fixed = TRUE)
loc
print(loc, source = parsed)

parseLatex documentation built on April 3, 2025, 5:27 p.m.