[Rd] assign, documentation (PR#1434)
Thu, 4 Apr 2002 17:02:53 +0100 (BST)
I do think that the issues are clearer if the help pages are separated,
and I have separated them. The crux seems to me to have been that too
many diverse concepts were on one help page.
I also noticed `-' is undocumented ... and left it so.
On 4 Apr 2002, Peter Dalgaard BSA wrote:
> firstname.lastname@example.org writes:
> > On Thu, 4 Apr 2002 Martin.Schlather@uni-bayreuth.de wrote:
> > > The help for `assign' says
> > >
> > > In all the assignment operator expressions, `x' can be a name or
> > > an expression defining a part of an object to be replaced (e.g.,
> > > `z[]'). The name does not need to be quoted, though it can be.
> > >
> > > So I would expect that by
> > > a<-1:4
> > > assign("a",2)
> > > the first component of a gets the value 2, but the object "a" is
> > > created.
> > > Could this be clarified in the documentation?
> > Could you suggest how? You quoted an *expression*, and the page refers to
> > quoting a *name*, so I don't know that I see the crux here.
> Actually, it *is* a name that is getting quoted, it just has these weird
> bracket characters in it, so it is not "syntactically valid".
> One improvement might be: "the name can be any string of text and may
> be quoted, but this is only necessary if it is not a syntactically
> valid name."
> We might also emphasize that "assignment operator expressions" does
> not include assign(), only <-, <<-, and =. (And _ until we finally get
> it killed...). On the other hand it is arguably clear enough already,
> if read carefully. (For this reason alone, the posters remark is off
> base, but he might have asked about "a" <- 2.)
> In assign(), `x' must be a character object. As in
> > a <- "b"
> > assign(a,2)
> > a
>  "b"
> > b
>  2
> O__ ---- Peter Dalgaard Blegdamsvej 3
> c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
> (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
> ~~~~~~~~~~ - (email@example.com) FAX: (+45) 35327907
Brian D. Ripley, firstname.lastname@example.org
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
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