miceadds (version 1.5-0)

grep.vec: RUtilities: Vector Based Version of grep

Description

This function imitates the usage of grep but it is extended to a vector argument.

Usage

grep.vec(pattern.vec, x, operator="AND")

Arguments

pattern.vec

String which should be looked for in vector x

x

A character vector

operator

An optional string. The default argument "AND" searches all entries in x which contain all elements of pattern.vec. If operator is different from the default, then the "OR" logic applies,

Examples

vec <- c("abcd" , "bcde" , "aedf" , "cdf" )
# search for entries in vec with contain 'a' and 'f'
#  -> operator = "AND"
grep.vec( pattern.vec=c("a","f") , x=vec )
  ##   $x
  ##   [1] "aedf"
  ##   $index.x
  ##   [1] 3

# search for entries in vec which contain 'a' or 'f'
grep.vec( pattern.vec=c("a","f") , x=vec , operator="OR")
  ##   $x
  ##   [1] "abcd" "aedf" "cdf" 
  ##   $index.x
  ##   [1] 1 3 4