substr

substr

substr(x, start, stop) extracts a substring between the given character positions, inclusive on both ends, using 1-based indexing. substr() can also be used on the left side of an assignment to replace part of a string in place. This is R's built-in way to slice strings by position.

Note: Unlike many languages, substr()'s stop index is inclusive -- substr("hello", 1, 3) gives "hel", including position 3.

Example: substr

text <- "Hello, R World!"

cat(substr(text, 1, 5), "\n")
cat(substr(text, 8, 8), "\n")