[Rd] text() does not accept data of type POSIXlt (PR#2487)
Wolfram Fischer - Z/I/M
Wed Jan 22 18:32:02 2003
Thanks for your hint about POSIXt and POSIXlt.
Excuse me that I bothered you with my message.
I thought that text() is a function which is used often in
combination with plot(). I have the opinion that it would be
helpful if such functions are harmonised as good as possible. -
Therefore I took the time to inform about my observation.
--- In reply to: ---
>Date: 22.01.03 14:13 (+0000)
>To: To firstname.lastname@example.org
>Subject: Re: [Rd] text() does not accept data of type POSIXlt (PR#2487)
> Where is the R bug here?
> The dates are *NOT* `of type POSIXlt': they are of type list but
> class c("POSIXt", "POSIXlt")
> plot() is a generic function with a POSIXlt method.
> text() has no POSIXt nor POSIXlt method.
> Nothing says that an arbitrary function you choose will accept arbitrary
> input, nor that plot and points, lines, text etc will have compatible
> methods: there are dozens of exceptions.
> On Wed, 22 Jan 2003 email@example.com wrote:
> > [R 1.6.1]
> > PROBLEM
> > If text() is called with an argument of type POSIXlt,
> > I get the following error message:
> > "Error in as.double.default(x) :
> > (list) object cannot be coerced to vector type 14"
> > REMARK
> > plot() accepts this data.
> > EXAMPLE
> > data( Lifeboats, package='vcd' )
> > attach(Lifeboats)
> > plot( launch, total )
> > text( launch, total, labels=seq( along=as.vector( launch ) ) )
> > detach(Lifeboats)
> 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)
> 1 South Parks Road, +44 1865 272866 (PA)
> Oxford OX1 3TG, UK Fax: +44 1865 272595