R Utilities: Vector Based Versions of grep
— grep.vec" />
grep
grep.vec.Rd
These functions slightly extend the usage of grep
but it is
extended to a vector argument.
grep.vec(pattern.vec, x, operator="AND", ...) grepvec( pattern.vec, x, operator="AND", value=FALSE, ...) grep_leading( pattern, x, value=FALSE ) grepvec_leading( patternvec, x, value=FALSE )
pattern.vec | String which should be looked for in vector |
---|---|
x | A character vector |
operator | An optional string. The default argument |
pattern | String |
patternvec | Vector of strings |
value | Logical indicating whether indices or values are requested |
... | Arguments to be passed to |
############################################################################# # EXAMPLE 1: Toy example ############################################################################# 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 grepvec( pattern.vec=c("a","f"), x=vec, value=TRUE) grepvec( pattern.vec=c("a","f"), x=vec, value=FALSE) # 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