Revision 37b192387cb2bbdafc5c33c24f943363da73d2e4 authored by Doug and Martin on 23 February 2011, 00:00:00 UTC, committed by Gabor Csardi on 23 February 2011, 00:00:00 UTC
1 parent 0c2a79e
abIseq.Rd
\name{abIseq}
\title{Sequence Generation of "abIndex", Abstract Index Vectors}
\Rdversion{1.1}
%
\alias{abIseq}
\alias{abIseq1}
\alias{c.abIndex}
%
\description{
Generation of abstract index vectors, i.e., objects of class
\code{"\linkS4class{abIndex}"}.
\code{abIseq()} is designed to work entirely like \code{\link{seq}},
but producing \code{"abIndex"} vectors.\cr
\code{abIseq1()} is its basic building block, where
\code{abIseq1(n,m)} corresponds to \code{n:m}.
\code{c(x, ...)} will return an \code{"abIndex"} vector, when \code{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)
\method{c}{abIndex}(\dots)
}
\arguments{
\item{from, to}{the starting and (maximal) end value of the sequence.}
\item{by}{number: increment of the sequence.}
\item{length.out}{desired length of the sequence. A
non-negative number, which for \code{seq} and \code{seq.int} will be
rounded up if fractional.}
\item{along.with}{take the length from the length of this argument.}
\item{\dots}{in general an arbitrary number of \R objects; here,
when the first is an \code{"\linkS4class{abIndex}"} vector, these
arguments will be concatenated to a new \code{"abIndex"} object.}
}
%\author{Martin Maechler}
% \details{
% }
\value{
An abstract index vector, i.e., object of class
\code{"\linkS4class{abIndex}"}.
}
% \references{
% %% ~put references to the literature/web site here ~
% }
\seealso{
the class \code{\linkS4class{abIndex}} documentation;
\code{\link{rep2abI}()} for another constructor;
\code{\link{rle}} (\pkg{base}).
}
\examples{
stopifnot(identical(-3:20,
as(abIseq1(-3,20), "vector")))
if(FALSE) ## (arithmetic) not yet implemented
abIseq(1, 50, by = 3)
%% FIXME: add / exchange with ../tests/abIndex-tsts.R
}
\keyword{manip}
\keyword{classes}
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