txt_grepl: Look up a multiple patterns and indicate their presence in...

In udpipe: Tokenization, Parts of Speech Tagging, Lemmatization and Dependency Parsing with the 'UDPipe' 'NLP' Toolkit

Look up a multiple patterns and indicate their presence in text

Description

A variant of grepl which allows to specify multiple regular expressions and allows to combine the result of these into one logical vector.
You can specify how to combine the results of the regular expressions by specifying an aggregate function like all, any, sum.

Usage

txt_grepl(
  x,
  pattern,
  FUN = all,
  ignore.case = FALSE,
  perl = FALSE,
  fixed = FALSE,
  useBytes = FALSE,
  ...
)

Arguments

x	a character vector
pattern	a character vector containing one or several regular expressions
FUN	a function to apply to combine the results ot the different regular expressions for each element of x. Defaults to all.
ignore.case	passed on to grepl
perl	passed on to grepl
fixed	passed on to grepl
useBytes	passed on to grepl
...	further arguments passed on to FUN

Value

a logical vector with the same length as x with the result of the call to FUN applied elementwise to each result of grepl for each pattern

See Also

grepl

Examples

x <- c("--A--", "--B--", "--ABC--", "--AC--", "Z")
txt_grepl(x, pattern = c("A", "C"), FUN = all)
txt_grepl(x, pattern = c("A", "C"), FUN = any)
txt_grepl(x, pattern = c("A", "C"), FUN = sum)
data.frame(x = x, 
           A_and_C = txt_grepl(x, pattern = c("A", "C"), FUN = all),
           A_or_C  = txt_grepl(x, pattern = c("A", "C"), FUN = any),
           A_C_n   = txt_grepl(x, pattern = c("A", "C"), FUN = sum))
txt_grepl(x, pattern = "A|C")

udpipe documentation built on Jan. 6, 2023, 5:06 p.m.