sequence {base} R Documentation

## Create A Vector of Sequences

### Description

The default method for sequence generates the sequence seq(from[i], by = by[i], length.out = nvec[i]) for each element i in the parallel (and recycled) vectors from, by and nvec. It then returns the result of concatenating those sequences.

### Usage

sequence(nvec, ...)
## Default S3 method:
sequence(nvec, from = 1L, by = 1L, ...)


### Arguments

 nvec coerced to a non-negative integer vector each element of which specifies the length of a sequence. from coerced to an integer vector each element of which specifies the first element of a sequence. by coerced to an integer vector each element of which specifies the step size between elements of a sequence. ... additional arguments passed to methods.

### Details

Negative values are supported for from and by. sequence(nvec, from, by=0L) is equivalent to rep(from, each=nvec).

This function was originally implemented in R with fewer features, but it has since become more flexible, and the default method is implemented in C for speed.

### Author(s)

Of the current version, Michael Lawrence based on code from the S4Vectors Bioconductor package

gl, seq, rep.

### Examples

sequence(c(3, 2)) # the concatenated sequences 1:3 and 1:2.
#>  1 2 3 1 2
sequence(c(3, 2), from=2L)
#>  2 3 4 2 3
sequence(c(3, 2), from=2L, by=2L)
#>  2 4 6 2 4
sequence(c(3, 2), by=c(-1L, 1L))
#>  1 0 -1 1 2


[Package base version 4.3.0 Index]