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

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Wed, 09 May 2007 15:00:14 +0100 (BST)

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]]
>
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>

-- 
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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