legend()s text color - R-devel

Wed, Feb 25, 2004 6:51 AM #

{moved from R-help to R-devel}

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.

Martin

Uwe Ligges

Wed, Feb 25, 2004 7:01 AM #

Martin Maechler wrote:

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

Marc Schwartz

Wed, Feb 25, 2004 7:47 AM #

On Wed, 2004-02-25 at 08:02, Uwe Ligges wrote:

Martin,

Thanks for taking this on. 

I'll throw in my vote and support the text.col = par("col") approach.

Best regards,

Marc

Paul Murrell

Wed, Feb 25, 2004 5:49 PM #

Hi

Marc Schwartz wrote:

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/

Martin Maechler

Thu, Feb 26, 2004 1:43 AM #

Paul> Hi

Paul> 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.


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

    Paul> Paul

Thank you Paul (and Marc and Uwe).

      legend(...., text.col = par("col"))

is now committed to R-devel.

Martin