These helpers take two endpoints and return the sequence of all
integers within that interval. For seq2_along()
, the upper
endpoint is taken from the length of a vector. Unlike
base::seq()
, they return an empty vector if the starting point is
a larger integer than the end point.
seq2(from, to) seq2_along(from, x)
from | The starting point of the sequence. |
---|---|
to | The end point. |
x | A vector whose length is the end point. |
An integer vector containing a strictly increasing sequence.
seq2(2, 10) #> [1] 2 3 4 5 6 7 8 9 10 seq2(10, 2) #> integer(0) seq(10, 2) #> [1] 10 9 8 7 6 5 4 3 2 seq2_along(10, letters) #> [1] 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26