str.locate.all: Finds start and end positions of all substrings that match...

In skranz/stringtools: Tools for working with strings in R

Finds start and end positions of all substrings that match pattern

Description

Finds start and end positions of all substrings that match pattern

Usage

## S3 method for class 'locate.all'
str(str, pattern, fixed = TRUE, perl = FALSE,
  ignore = NULL, ignore.pos = NULL, only.pos = NULL)

Arguments

ignore.pos

a logical vector or logical matrix indicating which locations of str shall be ignored in the search

Value

a list, of matrices n * 2 matrices. The first column is the start position, second column end position of each match

Examples

## Not run: 
  str.locate.all("0120121","1")
  str.locate.all(c("0120121","abce","011"),"1")

  str = c("0120121","abce","011bb1")
  #str = c("0120121")
  ignore = rep(FALSE,max(nchar(str)))
  ignore[c(2:4)] = TRUE  
  str.locate.all(str,"1",ignore=ignore)
  ignore.pos = rbind(c(2,4))
  str.locate.all(str,"1",ignore.pos=ignore.pos)
  
  str.locate.all(str,c("1","b","a"),ignore=ignore)
  
  str = c("0120121")
  str.locate.all(str,c("1","b","2"),ignore=ignore)
  
  # Compare regular expression matching
  str = c("012ab0121","adch3b23","0123")
  gregexpr("[ab]*",str)
  str_locate_all(str,"[ab]*")  
  str.locate.first(str,"[ab]*",fixed=FALSE)
  str.locate.all(str,"[ab]*",fixed=FALSE)
  str.locate.all(str,c("[ab]*","3+","0*"),fixed=FALSE)
  str.locate.first(str,c("[ab]*","2","0*"),fixed=FALSE)
  str.locate.all(str,"ab",fixed=FALSE)
  
  return(ret)

## End(Not run)

skranz/stringtools documentation built on May 11, 2022, 4:48 a.m.