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)

Arguments

from

The starting point of the sequence.

to

The end point.

x

A vector whose length is the end point.

Value

An integer vector containing a strictly increasing sequence.

Examples

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