Description Usage Arguments Value Examples
Search for pattern matches, where trying to match to NA comes back as FALSE
1 | betterGrep(pattern, x, ignore.case = T, fixed = T)
|
pattern |
character string containing a regular expression (or character string for fixed = TRUE) to be matched in the given character vector. Coerced by as.character to a character string if possible. If a character vector of length 2 or more is supplied, the first element is used with a warning. |
x |
a character vector where matches are sought, or an object which can be coerced by as.character to a character vector. Long vectors are supported. |
ignore.case |
logical. if FALSE, the pattern matching is case sensitive and if TRUE, case is ignored during matching. |
fixed |
logical. If TRUE, pattern is a string to be matched as is. Overrides all conflicting arguments. |
Numeric vector holding the indices of elements of x
that had matches
1 2 3 4 5 6 7 | x = c("Alpha", "Beta", "Bet", NA_character_, "B")
betterGrep(pattern = "a", x)
betterGrep(pattern = NA, x)
betterGrep(pattern = NA, x, ignore.case = F)
betterGrep("Beta", x)
betterGrep("B", x)
betterGrep("X", x)
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