On Mon, Jul 23, 2018 at 2:17 PM, Duncan Murdoch <murdoch.dun...@gmail.com> wrote: > On 23/07/2018 3:03 PM, Hadley Wickham wrote: >> >> Hi all, >> >> Would you generally consider NULL to be a vector? > > > According to the language definition (in the doc directory), it is not: > "Vectors can be thought of as contiguous cells containing data. Cells are > accessed through indexing operations such as x[5]. More details are given in > Indexing. > > R has six basic (‘atomic’) vector types: logical, integer, real, complex, > string (or character) and raw. The modes and storage modes for the different > vector types are listed in the following table." > > and later > > "There is a special object called NULL. It is used whenever there is a need > to indicate or specify that an object is absent. It should not be confused > with a vector or list of zero length."
Perfect, thanks! Also available online at https://cran.r-project.org/doc/manuals/r-release/R-lang.html#Vector-objects Hadley -- http://hadley.nz ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
