util_extract_matches {dataquieR} | R Documentation |
return all matches of an expression
Description
return all matches of an expression
Usage
util_extract_matches(data, pattern)
Arguments
data |
a character vector |
pattern |
a character string containing a regular expression |
Value
A list with matching elements or NULL (in case on non-matching elements)
Author(s)
Josh O'Brien
See Also
Other process_functions:
util_abbreviate()
,
util_all_is_integer()
,
util_attach_attr()
,
util_bQuote()
,
util_backtickQuote()
,
util_coord_flip()
,
util_count_NA()
,
util_par_pmap()
,
util_setup_rstudio_job()
,
util_suppress_output()
Examples
## Not run: # not exported, so not tested
dat0 <- list("a sentence with citation (Ref. 12), (Ref. 13), and then (Ref. 14)",
"another sentence without reference")
pat <- "Ref. (\\d+)"
util_extract_matches(dat0, pat)
## End(Not run)
[Package dataquieR version 2.1.0 Index]