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

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Wed, 09 May 2007 15:44:16 +0100 (BST)

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

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