The R Project SVN R

Rev

Rev 62066 | Rev 65147 | Go to most recent revision | Show entire file | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 62066 Rev 62073
Line 122... Line 122...
122 
  It is an error to apply any of these operators to an object which is
 122 
  It is an error to apply any of these operators to an object which is
123 
  not subsettable (e.g. a function).
 123 
  not subsettable (e.g. a function).
124 
}
 124 
}
125 
 
 125 
 
126 
\section{Atomic vectors}{
 126 
\section{Atomic vectors}{
127 
  The usual form of indexing is \code{"["}.  \code{"[["} can be used to
 127 
  The usual form of indexing is \code{[}.  \code{[[} can be used to
128 
  select a single element \emph{dropping} \code{\link{names}}, whereas
 128 
  select a single element \emph{dropping} \code{\link{names}}, whereas
129 
  \code{"["} keeps them, e.g., in \code{c(abc = 123)[1]}.
 129 
  \code{[} keeps them, e.g., in \code{c(abc = 123)[1]}.
130 
 
 130 
 
131 
  The index object \code{i} can be numeric, logical, character or empty.
 131 
  The index object \code{i} can be numeric, logical, character or empty.
132 
  Indexing by factors is allowed and is equivalent to indexing by the
 132 
  Indexing by factors is allowed and is equivalent to indexing by the
133 
  numeric codes (see \code{\link{factor}}) and not by the character
 133 
  numeric codes (see \code{\link{factor}}) and not by the character
134 
  values which are printed (for which use \code{[as.character(i)]}).
 134 
  values which are printed (for which use \code{[as.character(i)]}).