| substr {base} | R Documentation |
substr takes a character vector as an argument and returns a
vector whose elements contain the substring starting with the
character at position start up to the character at position
stop. If start is larger than the string length then
NA is returned. If stop is longer than start
and error is signalled.
substring is compatible with S. For vector arguments, it
expands the arguments cyclically.
substr(x, start, stop)
substring(text, first, last = 1000000)
strsplit, paste, nchar.
substr("abcdef",2,4)
substring("abcdef",1:6,1:6)
substr(rep("abcdef",4),1:4,4:5)
x <- c("asfef", "qwerty", "yuiop[", "b", "stuff.blah.yech")
all(substr(x, 2, 5) == substring(x, 2, 5)) #> TRUE
substr(x, 2, 5)
substring(x, 2, 4:6)