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Ecfun (version 0.1-4)

grepNonStandardCharacters: grep for nonstandard characters

Description

Return the indices of elements of x containing characters that are not in standardCharacters.

Usage

grepNonStandardCharacters(x, value=FALSE,
   standardCharacters=c(letters, LETTERS, ' ','.', ',', 0:9,
      '"', "'", '-', '_', '(', ')', '[', ']', ''),
   ... )
x{
    character vector in which it is desired to identfy elements
    containing characters not in standardCharacters.
  }
  value{
    logical:  TRUE to return the values found in x,
    FALSE to return their indices.
  }
  standardCharacters{
    Characters to overlook in x to identify anything not in
    standardCharacters.
  }
  ...{ optional arguments for regexpr }

1.  x. <- strsplit(x, ''):  convert the input character vector to a
  list of vectors of character vectors with nchar(x.[i]) == 1
    for i in 1:length(x).
  2.  sapply(x., ...) to identify all elements for which any element of
  x[[i]] is not in standardCharacters.

an integer vector identifying all elements of x containing a
  character not in standardCharacters.
[object Object]
stringi-package
  grep,
  regexpr,
  subNonStandardCharacters,
  showNonASCIINames <- c('Raul', 'Ra`l', 'Torres,Raul', 'Torres, Raul')
#  confusion in character sets can create
#  names like Names[2]
chk <- grepNonStandardCharacters(Names)
stopifnot(
all.equal(chk, 2)
)
chkv <- grepNonStandardCharacters(Names, TRUE)
stopifnot(
all.equal(chkv, 'Ra`l')
)

manip

Arguments