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\name{NaArray-misc-methods}
\alias{NaArray-misc-methods}
\alias{NaArray_misc_methods}
\alias{NaArray-misc}
\alias{NaArray_misc}
\alias{is.na,NaArray-method}
\alias{is.nan,NaArray-method}
\alias{is.infinite,NaArray-method}
\title{Miscellaneous operations on a NaArray object}
\description{
This man page documents various base array operations that are
supported by \link{NaArray} derivatives, and that didn't belong
to any of the groups of operations documented in the other man pages
of the \pkg{SparseArray} package.
}
\usage{
# --- unary isometric array transformations ---
\S4method{is.nan}{NaArray}(x)
\S4method{is.infinite}{NaArray}(x)
# --- N-ary isometric array transformations ---
# COMING SOON...
}
\arguments{
\item{x}{
An \link{NaArray} object.
}
}
\details{
More operations will be added in the future.
}
\value{
\code{is.nan()} and \code{is.infinite()} return a \link{SparseArray}
object of \code{type()} \code{"logical"} and same dimensions as the
input object.
}
\seealso{
\itemize{
\item \code{base::\link[base]{is.nan}} and
\code{base::\link[base]{is.infinite}} in base R.
\item \link{NaArray} objects.
\item \link{SparseArray} objects.
\item Ordinary \link[base]{array} objects in base R.
}
}
\examples{
a <- array(c(NA, 2.77, NaN, Inf, NA, -Inf), dim=5:3)
naa <- NaArray(a) # NaArray object
naa
is.nan(naa) # SparseArray object of type "logical"
is.infinite(naa) # SparseArray object of type "logical"
## Sanity checks:
res <- is.nan(naa)
stopifnot(is(res, "SparseArray"), type(res) == "logical",
identical(as.array(res), is.nan(a)))
res <- is.infinite(naa)
stopifnot(is(res, "SparseArray"), type(res) == "logical",
identical(as.array(res), is.infinite(a)))
}
\keyword{array}
\keyword{methods}
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