Re: [Rd] fix() changes the class of mts objects

From: Simone Giannerini <sgiannerini_at_gmail.com>
Date: Wed, 09 May 2007 17:11:34 +0200

I think that a simple statement mentioning the issue in the documentation of fix() would be helpful.

regards

Simone

On 5/9/07, Prof Brian Ripley <ripley_at_stats.ox.ac.uk> wrote:
>
> On Wed, 9 May 2007, Simone Giannerini wrote:
>
> > My concern here is that users can be confused from the fact that if one
> has
> > a single time series fix() uses the default method of edit() and does
> not
> > change
> > its class
> >
> >> x <- ts(1:5)
> >> fix(x)
> >> class(x)
> > [1] "ts"
> >
> > whereas for mts objects edit.data.frame is used so that in my opinion it
> > might be worth to clarify it in the documentation.
>
> Which documentation do you suggest? That vectors and matrices are treated
> differently is there.
>
> >
> > Regards
> >
> > Simone
> >
> > On 5/9/07, Prof Brian Ripley <ripley_at_stats.ox.ac.uk> wrote:
> >>
> >> Why did you expect otherwise?: fix() is treating it as matrix and
> >> ?edit.matrix says that it only works on 'simple data frames' (and
> converts
> >> matrices to such).
> >>
> >> Editing R objects can easily change aspects of them, as dput() is not
> >> faithful, environments can get lost and so on.
> >>
> >> On Wed, 9 May 2007, Simone Giannerini wrote:
> >>
> >> > Dear all,
> >> >
> >> > it looks like fix() changes the class of mts objects, here is a
> >> reproducible
> >> > example (tested both on WinXP and Linux):
> >> >
> >> >> x <- ts(cbind(1:5,1:5))
> >> >> x
> >> > Time Series:
> >> > Start = 1
> >> > End = 5
> >> > Frequency = 1
> >> > Series 1 Series 2
> >> > 1 1 1
> >> > 2 2 2
> >> > 3 3 3
> >> > 4 4 4
> >> > 5 5 5
> >> >> class(x)
> >> > [1] "mts" "ts"
> >> >> edit(x)
> >> > Series 1 Series 2
> >> > [1,] 1 1
> >> > [2,] 2 2
> >> > [3,] 3 3
> >> > [4,] 4 4
> >> > [5,] 5 5
> >> >> class(x)
> >> > [1] "mts" "ts"
> >> >> fix(x)
> >> >> class(x)
> >> > [1] "matrix"
> >> >> x
> >> > Series 1 Series 2
> >> > [1,] 1 1
> >> > [2,] 2 2
> >> > [3,] 3 3
> >> > [4,] 4 4
> >> > [5,] 5 5
> >> >
> >> >> R.version
> >> > _
> >> > platform i386-pc-mingw32
> >> > arch i386
> >> > os mingw32
> >> > system i386, mingw32
> >> > status
> >> > major 2
> >> > minor 5.0
> >> > year 2007
> >> > month 04
> >> > day 23
> >> > svn rev 41293
> >> > language R
> >> > version.string R version 2.5.0 (2007-04-23)
> >> >
> >> >> R.version
> >> > platform x86_64-unknown-linux-gnu
> >> > arch x86_64
> >> > os linux-gnu
> >> > system x86_64, linux-gnu
> >> > status
> >> > major 2
> >> > minor 5.0
> >> > year 2007
> >> > month 04
> >> > day 23
> >> > svn rev 41293
> >> > language R
> >> > version.string R version 2.5.0 (2007-04-23)
> >> >
> >> > ______________________________________________________
> >> >
> >> > Simone Giannerini
> >> > Dipartimento di Scienze Statistiche "Paolo Fortunati"
> >> > Universita' di Bologna
> >> > Via delle belle arti 41 - 40126 Bologna, ITALY
> >> > Tel: +39 051 2098262 Fax: +39 051 232153
> >> > ______________________________________________________
> >> >
> >> > [[alternative HTML version deleted]]
> >> >
> >> > ______________________________________________
> >> > R-devel_at_r-project.org mailing list
> >> > https://stat.ethz.ch/mailman/listinfo/r-devel
> >> >
> >>
> >> --
> >> Brian D. Ripley, ripley_at_stats.ox.ac.uk
> >> 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
> >>
> >
> >
> >
> >
>
> --
> Brian D. Ripley, ripley_at_stats.ox.ac.uk
> 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
>

-- 
______________________________________________________

Simone Giannerini
Dipartimento di Scienze Statistiche "Paolo Fortunati"
Universita' di Bologna
Via delle belle arti 41 - 40126  Bologna,  ITALY
Tel: +39 051 2098262  Fax: +39 051 232153
______________________________________________________

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