>>>>> Suharto Anggono Suharto Anggono via R-devel
>>>>> on Mon, 18 Feb 2019 16:37:01 +0000 writes:
> The statement in R devel: There is no \code{data.frame}
> method for \code{$}, so \code{x$name} uses the default
> method which treats \code{x} as a list (with no partial
> matching of column names). The replacement method (for
> \code{$}) checks \code{value} for the correct number of
> rows, and replicates it if necessary.
> The added "(with no partial matching of column names)" is
> wrong. The default method of '$' (for extraction) allows
> partial matching for list; partial matching gives warning
> if option warnPartialMatchDollar is TRUE.
Yes, thank you!
Indeed, of course it *is* matched when it can be matched uniquely;
otherwise it's silently not matched, returning NULL;
all as it has always been and well documented in ?Extract.
Martin
> --------------------------------------------
> On Fri, 15/2/19, Martin Maechler
> <maech...@stat.math.ethz.ch> wrote:
> Subject: Re: [Rd] Extract.data.frame.Rd about
> $.data.frame
> Cc: r-devel@r-project.org Date: Friday, 15 February,
> 2019, 4:15 PM
>>>>> Suharto Anggono Suharto Anggono via R-devel
>>>>> on Sun, 10 Feb 2019 16:33:25 +0000 writes:
>> In R devel, data.frame method of '$' has been removed,
>> but this part of "Details" section of
>> Extract.data.frame.Rd still implies existence of the
>> method. The \code{data.frame} method for \code{$},
>> treats \code{x} as a list, except that (as of R-3.1.0)
>> partial matching of \code{name} to the names of \code{x}
>> will generate a warning; this may become an error in
>> future versions. The replacement method checks
>> \code{value} for the correct number of rows, and
>> replicates it if necessary.
>> Statement from before R 3.1.0 could be used again:
>> There is no \code{data.frame} method for \code{$}, so
>> \code{x$name} uses the default method which treats
>> \code{x} as a list. There is a replacement method which
>> checks \code{value} for the correct number of rows, and
>> replicates it if necessary.
> [[elided Yahoo spam]] I've added a 2 x 2 words of
> explanation to make it easier to understand.
> Now changed. Martin
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