From sgiannerini at gmail.com  Thu Jan  8 16:59:50 2009
From: sgiannerini at gmail.com (Simone Giannerini)
Date: Thu, 8 Jan 2009 16:59:50 +0100
Subject: [Rd] legend() in a multiple figure environment
In-Reply-To: <alpine.LFD.2.00.0901081456400.24830@auk.stats.ox.ac.uk>
References: <3c12769c0901080231l28c5442fu2c1a23d0228c71ce@mail.gmail.com>
	<4965E02D.7030000@epfl.ch>
	<3c12769c0901080508h7afea9cawbd787cb8722b6ef6@mail.gmail.com>
	<18790.554.354696.731117@stat.math.ethz.ch>
	<3c12769c0901080629u21c44325ke2771c0b37495f@mail.gmail.com>
	<alpine.LFD.2.00.0901081456400.24830@auk.stats.ox.ac.uk>
Message-ID: <3c12769c0901080759k113b62fakce43fbd61b31091c@mail.gmail.com>

Thanks for your clarifications,
I use legends only when the plot is at its final size and also had a
look at windows() before posting but at first I could not relate the
legends' behaviour to the resizing effect.

Kind regards,

Simone


On Thu, Jan 8, 2009 at 4:02 PM, Prof Brian Ripley <ripley at stats.ox.ac.uk> wrote:
> On Thu, 8 Jan 2009, Simone Giannerini wrote:
>
>> Now I got how to reproduce it, it has nothing to do with multiple
>> figure environment but rather with figure resizing. Here it is:
>>
>> curve(dnorm,col=4,from=-4,to=4);
>> legend(-4,0.3,legend="curve",lty=1,col=4)
>>
>> # Now expand the figure to full screen
>>
>> legend(-4,0.2,legend="curve",lty=1,col=4)
>
> When you resize graphics, text stays the same size (on most devices) and
> vector graphics does not. You can't expect the figure to be recomputed when
> you resize (and if you expect so, your expectations will be unfufilled).
>  All that happens is that a low-level description is replayed.
>
> The windows() device does give you more options on resize.
>
>>
>> Simone
>>
>> On Thu, Jan 8, 2009 at 2:39 PM, Martin Maechler
>> <maechler at stat.math.ethz.ch> wrote:
>>>
>>>>>>>> "SG" == Simone Giannerini <sgiannerini at gmail.com>
>>>>>>>>    on Thu, 8 Jan 2009 14:08:17 +0100 writes:
>>>
>>>   SG> Dear Mathieu, On Thu, Jan 8, 2009 at 12:14 PM, Mathieu
>>>   SG> Ribatet <mathieu.ribatet at epfl.ch> wrote:
>>>  >> Dear Simone,
>>>  >>
>>>  >> Did mean that the legend (text and/or box) overlap with
>>>  >> the Normal density?
>>>
>>>   SG> no, I mean that the two legend() commands, which are
>>>   SG> identical in all but the y-coordinates, produce
>>>   SG> different results, namely boxes with different widths.
>>>
>>> I don't see that behavior at all, rather the two boxes have
>>> identical dimensions for me.
>>>
>>> What does  dev.cur() say?  if anything with "X11..." (as you are
>>> on Linux),  what does
>>>
>>>  str(X11.options())
>>>
>>> give?
>>>
>>>
>>>   SG> Ciao
>>>
>>>   SG> Simone
>>>
>>>  >> If so then I think there's no problem as the legend is
>>>  >> placed where you told R to do. And R won't check (for
>>>  >> you) if it will overlap or not with pre-existing
>>>  >> graphical elements.
>>>  >>
>>>  >> On my computer, I got the expected results - if I
>>>  >> understood correctly your issue though. For information:
>>>  >>
>>>  >> R version 2.8.1 (2008-12-22) Linux mathieu-laptop
>>>  >> 2.6.27-11-generic #1 SMP Fri Dec 19 16:29:52 UTC 2008
>>>  >> i686 GNU/Linux (Ubuntu Intrepid)
>>>  >>
>>>  >> Cheers, Mathieu
>>>  >>
>>>  >> Simone Giannerini a ?crit :
>>>  >>>
>>>  >>> Dear all,
>>>  >>>
>>>  >>> there seems to be a problem with displayed legends when
>>>  >>> a multiple figure environment is used, see the following
>>>  >>> example:
>>>  >>>
>>>  >>> par(mfrow=c(1,2)) curve(dnorm,col=4,from=-4,to=4);
>>>  >>> legend(-4,0.3,legend="curve",lty=1,col=4)
>>>  >>> legend(-4,0.2,legend="curve",lty=1,col=4)
>>>  >>>
>>>  >>>
>>>  >>> On my machines the first time the command legend() is
>>>  >>> issued the legend box stretches over the
>>>  >>> curve. Subsequent calls to legend seems to produce a
>>>  >>> correct box instead.
>>>  >>>
>>>  >>> openSuse 11.0
>>>  >>>
>>>  >>> platform x86_64-unknown-linux-gnu arch x86_64 os
>>>  >>> linux-gnu system x86_64, linux-gnu status Patched major
>>>  >>> 2 minor 8.1 year 2009 month 01 day 07 svn rev 47501
>>>  >>> language R version.string R version 2.8.1 Patched
>>>  >>> (2009-01-07 r47501)
>>>  >>>
>>>  >>> I see this on the same version of R on Windows VISTA 32
>>>  >>> bit as well; I do not see this behaviour on a machine
>>>  >>> with R 2.8.0.
>>>  >>>
>>>  >>> Thank you,
>>>  >>>
>>>  >>> Simone
>>>  >>> --
>>>  >>> ______________________________________________________
>>>  >>>
>>>  >>> 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 http://www2.stat.unibo.it/giannerini/
>>>  >>>
>>>  >>> ______________________________________________
>>>  >>> R-devel at r-project.org mailing list
>>>  >>> https://stat.ethz.ch/mailman/listinfo/r-devel
>>>  >>>
>>>  >>
>>>>
>>>> --
>>>> Institute of Mathematics Ecole Polytechnique F?d?rale de
>>>
>>>  >> Lausanne STAT-IMA-FSB-EPFL, Station 8 CH-1015 Lausanne
>>>  >> Switzerland http://stat.epfl.ch/ Tel: + 41 (0)21 693 7907
>>>  >>
>>>  >>
>>>  >>
>>>
>>>
>>>
>>> --
>>> ______________________________________________________
>>>
>>>   SG> Simone Giannerini Dipartimento di Scienze Statistiche
>>>   SG> "Paolo Fortunati" Universita' di Bologna Via delle belle
>>>   SG> arti 41 - 40126 Bologna, ITALY Tel: +39 051 2098262 Fax:
>>>   SG> +39 051 232153 http://www2.stat.unibo.it/giannerini/
>>>
>>>   SG> ______________________________________________
>>>   SG> R-devel at r-project.org mailing list
>>>   SG> https://stat.ethz.ch/mailman/listinfo/r-devel
>>
>>
>>
>> --
>> ______________________________________________________
>>
>> 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
>> http://www2.stat.unibo.it/giannerini/
>>
>> ______________________________________________
>> 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



-- 
______________________________________________________

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
http://www2.stat.unibo.it/giannerini/



[Rd] legend() in a multiple figure environment
Simone Giannerini