| abIseq {Matrix} | R Documentation |
Sequence Generation of "abIndex", Abstract Index Vectors
Description
Generation of abstract index vectors, i.e., objects of class
"abIndex".
abIseq() is designed to work entirely like seq,
but producing "abIndex" vectors.
abIseq1() is its basic building block, where
abIseq1(n,m) corresponds to n:m.
c(x, ...) will return an "abIndex" vector, when x
is one.
Usage
abIseq1(from = 1, to = 1)
abIseq (from = 1, to = 1, by = ((to - from)/(length.out - 1)),
length.out = NULL, along.with = NULL)
## S3 method for class 'abIndex'
c(...)
Arguments
from, to |
the starting and (maximal) end value of the sequence. |
by |
number: increment of the sequence. |
length.out |
desired length of the sequence. A
non-negative number, which for |
along.with |
take the length from the length of this argument. |
... |
in general an arbitrary number of R objects; here,
when the first is an |
Value
An abstract index vector, i.e., object of class
"abIndex".
See Also
the class abIndex documentation;
rep2abI() for another constructor;
rle (base).
Examples
stopifnot(identical(-3:20,
as(abIseq1(-3,20), "vector")))
try( ## (arithmetic) not yet implemented
abIseq(1, 50, by = 3)
)