From @uh@rto_@nggono @end|ng |rom y@hoo@com  Mon Feb 18 17:37:01 2019
From: @uh@rto_@nggono @end|ng |rom y@hoo@com (Suharto Anggono Suharto Anggono)
Date: Mon, 18 Feb 2019 16:37:01 +0000 (UTC)
Subject: [Rd] Extract.data.frame.Rd about $.data.frame
References: <123537925.1052826.1550507821051.ref@mail.yahoo.com>
Message-ID: <123537925.1052826.1550507821051@mail.yahoo.com>

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.

--------------------------------------------
On Fri, 15/2/19, Martin Maechler <maechler at stat.math.ethz.ch> wrote:

 Subject: Re: [Rd] Extract.data.frame.Rd about $.data.frame

 Cc: r-devel at 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



[Rd] Extract.data.frame.Rd about $.data.frame
Suharto Anggono Suharto Anggono