Update packages/ Add org-ref

elpa/ess-20180611.502/etc/Extract.factor.Rd

@@ -0,0 +1,56 @@
+%% ESS BUG: Indentation ([Tab]) does not work if point is after \arguments{..}
+%% -------  almost surely because of the (non-escaped) "[".
+%% and this, all below is original from the R sources (R-devel, 2014-03-05)
+
+% File src/library/base/man/Extract.factor.Rd
+% Part of the R package, http://www.R-project.org
+% Copyright 1995-2010 R Core Team
+% Distributed under GPL 2 or later
+
+\name{Extract.factor}
+\title{Extract or Replace Parts of a Factor}
+\alias{[.factor}
+\alias{[<-.factor}
+\alias{[[.factor}
+\alias{[[<-.factor}
+\description{
+  Extract or replace subsets of factors.
+}
+\usage{
+\method{[}{factor}(x, \dots, drop = FALSE)
+\method{[[}{factor}(x, \dots)
+\method{[}{factor}(x, \dots) <- value
+\method{[[}{factor}(x, \dots) <- value
+}
+\arguments{
+  \item{x}{a factor}
+  \item{\dots}{a specification of indices -- see \code{\link{Extract}}.}
+  \item{drop}{logical.  If true, unused levels are dropped.}
+  \item{value}{character: a set of levels.  Factor values are coerced to
+    character.}
+}
+\value{
+  A factor with the same set of levels as \code{x} unless \code{drop = TRUE}.
+}
+\details{
+  When unused levels are dropped the ordering of the remaining levels is
+  preserved.
+
+  If \code{value} is not in \code{levels(x)}, a missing value is
+  assigned with a warning.
+
+  Any \code{\link{contrasts}} assigned to the factor are preserved
+  unless \code{drop = TRUE}.
+
+  The \code{[[} method supports argument \code{exact}.
+}
+\seealso{
+  \code{\link{factor}}, \code{\link{Extract}}.
+}
+\examples{
+## following example(factor)
+(ff <- factor(substring("statistics", 1:10, 1:10), levels = letters))
+ff[, drop = TRUE]
+factor(letters[7:10])[2:3, drop = TRUE]
+}
+\keyword{category}