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% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/chunkutil.R
\name{chunk}
\alias{chunk}
\alias{chunk.default}
\title{Methods for chunked range index}
\usage{
chunk(x = NULL, ...)
\method{chunk}{default}(x = NULL, ..., RECORDBYTES = NULL, BATCHBYTES = NULL)
}
\arguments{
\item{x}{the object along we want chunks}
\item{\dots}{further arguments passed to \code{\link{chunks}}}
\item{RECORDBYTES}{integer scalar representing the bytes needed to process a single element of the boolean vector (default 4 bytes for logical)}
\item{BATCHBYTES}{integer scalar limiting the number of bytes to be processed in one chunk, default from \code{getOption("ffbatchbytes")} if not null, otherwise 16777216}
}
\value{
returns a named list of \code{\link{ri}} objects
representing chunks of subscripts
}
\description{
Calls \code{\link{chunks}} to create a sequence of range indexes along the object which causes the method dispatch.
}
\details{
\code{chunk} is generic, the default method is described here, other methods
that automatically consider RAM needs are provided with package 'ff', see
for example \code{\link[ff]{chunk.ffdf}}
}
\section{Methods (by class)}{
\itemize{
\item \code{default}: default vector method
}}
\section{available methods}{
\code{chunk.default}, \code{\link[ff:chunk.ffdf]{chunk.ff_vector}}, \code{\link[ff]{chunk.ffdf}}
}
\examples{
chunk(complex(1e7))
chunk(raw(1e7))
chunk(raw(1e7), length=3)
chunks(1,10,3)
# no longer do
chunk(1,100,10)
# but for bckward compatibility this works
chunk(from=1,to=100,by=10)
}
\seealso{
\code{\link{chunks}}, \code{\link{ri}}, \code{\link[base]{seq}}, \code{\link{bbatch}}
}
\author{
Jens Oehlschlägel
}
\keyword{data}
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