| sequence | R Documentation |
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.
sequence(nvec, ...) ## Default S3 method: sequence(nvec, from = 1L, by = 1L, ...)
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. |
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.
Of the current version, Michael Lawrence based on code from the S4Vectors Bioconductor package
gl, seq, rep.
sequence(c(3, 2)) # the concatenated sequences 1:3 and 1:2. #> [1] 1 2 3 1 2 sequence(c(3, 2), from=2L) #> [1] 2 3 4 2 3 sequence(c(3, 2), from=2L, by=2L) #> [1] 2 4 6 2 4 sequence(c(3, 2), by=c(-1L, 1L)) #> [1] 1 0 -1 1 2
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