repfromto: Virtual recycling

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

Virtual recycling

Description

repfromto virtually recylcles object x and cuts out positions ⁠from .. to⁠

Usage

repfromto(x, from, to)

repfromto(x, from, to) <- value

Arguments

x	an object from which to recycle
from	first position to return
to	last position to return
value	value to assign

Details

repfromto is a generalization of rep(), where rep(x, n) == repfromto(x, 1, n). You can see this as an R-side (vector) solution of the mod_iterate macro in arithmetic.c

Value

a vector of length from - to + 1

Author(s)

Jens Oehlschlägel

See Also

rep(), ff::ffvecapply()

Examples

  message("a simple example")
  repfromto(0:9, 11, 20)

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