From p.murrell at auckland.ac.nz  Thu Feb 26 01:49:23 2004
From: p.murrell at auckland.ac.nz (Paul Murrell)
Date: Thu Feb 26 01:49:34 2004
Subject: [Rd] Re: legend()s text color
References: <a06020410bc612f903765@[192.168.2.3]>	<403B927A.3000909@statistik.uni-dortmund.de>	<16444.43066.981715.541826@gargle.gargle.HOWL>	<403CAADC.3070405@statistik.uni-dortmund.de>
	<1077720399.12496.40.camel@localhost.localdomain>
Message-ID: <403D4293.1010802@stat.auckland.ac.nz>

Hi


Marc Schwartz wrote:
> On Wed, 2004-02-25 at 08:02, Uwe Ligges wrote:
> 
>>Martin Maechler wrote:
>>
>>
>>>{moved from R-help to R-devel}
>>>
>>>
>>>
>>>>>>>>"UweL" == Uwe Ligges <ligges@statistik.uni-dortmund.de>
>>>>>>>>   on Tue, 24 Feb 2004 19:05:46 +0100 writes:
>>>>>>>
>>>
>>>    UweL> Sebastien Durand wrote:
>>>    >> Hi,
>>>    >> 
>>>    >> Is there a way to change the color of the text inside a legend, let say 
>>>    >> I would like to use a black background in my legend, how can I get the 
>>>    >> text to show up, it is black!!!
>>>    >> So for example how could I change it to white...?
>>>    >> 
>>>    >> Sebastien
>>>
>>>
>>>    UweL> By setting par(fg = "white"):
>>>
>>>    UweL> plot(1:10)
>>>    UweL> par(fg="white")
>>>    UweL> legend(2,2, col="white", legend="A", bg="black")
>>>
>>>or  par(col = "white"),
>>>as Marc has suggested.
>>>
>>>legend()'s source code makes it very straightforward to add an
>>>argument 'text.col' for this purpose, and I have already done so
>>>in my development version.
>>>The question is really if the default should be
>>>   text.col = par("col")
>>>or text.col = par("fg")
>>>
>>>I'd currently tend for  par("col") , but the tendency is weak.
>>>
>>
>>I agree, I would expect the lines around the legend's box in par("fg"), 
>>but the font in par("col"). And indeed, that's already the case if both 
>>values have been set in par().
>>
>>Uwe
> 
> 
> 
> Martin,
> 
> Thanks for taking this on. 
> 
> I'll throw in my vote and support the text.col = par("col") approach.


There is little consistency to the interpretation of these parameters 
across different functions, but my preference would be to use "col"

Paul
-- 
Dr Paul Murrell
Department of Statistics
The University of Auckland
Private Bag 92019
Auckland
New Zealand
64 9 3737599 x85392
paul@stat.auckland.ac.nz
http://www.stat.auckland.ac.nz/~paul/


[Rd] Re: legend()s text color
Paul Murrell