vecseq: Vectorized Sequences
In bit: Classes and Methods for Fast Memory-Efficient Boolean Selections

vecseq

R Documentation

Vectorized Sequences

Description

vecseq returns concatenated multiple sequences

Usage

vecseq(x, y = NULL, concat = TRUE, eval = TRUE)

Arguments

`x`	vector of sequence start points
`y`	vector of sequence end points (if `is.null(y)` then `x` are taken as endpoints, all starting at 1)
`concat`	vector of sequence end points (if `is.null(y)` then `x` are taken as endpoints, all starting at 1)
`eval`	vector of sequence end points (if `is.null(y)` then `x` are taken as endpoints, all starting at 1)

Details

This is a generalization of sequence() in that you can choose sequence starts other than 1 and also have options to no concat and/or return a call instead of the evaluated sequence.

Value

if concat == FALSE and eval == FALSE a list with n calls that generate sequences
if concat == FALSE and eval == TRUE a list with n sequences
if concat == TRUE and eval == FALSE a single call generating the concatenated sequences
if concat == TRUE and eval == TRUE an integer vector of concatentated sequences

Author(s)

Angelo Canty, Jens Oehlschlägel

Examples


  sequence(c(3, 4))
  vecseq(c(3, 4))
  vecseq(c(1, 11), c(5, 15))
  vecseq(c(1, 11), c(5, 15), concat=FALSE, eval=FALSE)
  vecseq(c(1, 11), c(5, 15), concat=FALSE, eval=TRUE)
  vecseq(c(1, 11), c(5, 15), concat=TRUE, eval=FALSE)
  vecseq(c(1, 11), c(5, 15), concat=TRUE, eval=TRUE)

bit documentation built on April 4, 2025, 3:09 a.m.