[R] Making legend() look like my plot()

[Martin Maechler]

>>>>> "Dan" == Dan Bolser <dmb at mrc-dunn.cam.ac.uk>
>>>>>     on Thu, 25 Nov 2004 22:35:22 +0000 (GMT) writes:

    Dan> On Thu, 25 Nov 2004, Uwe Ligges wrote:
    >> Dan Bolser wrote:
    >>> Is this an impossible task?
    >>> 
    >>> How about just problem 2 below, having one pch in one
    >>> legend entry, but no pch in the second?
    >>  Please be at least a little bit patient! This is not a
    >> hotline! People are not working 24 hours a day just to
    >> answer your questions at once - they are answering
    >> questions on a voluntary basis!
    >> 
    >> answer 1) is not straightforward, but you might want to
    >> use one of fillable symbols mentioned in ?points,
    >> e.g. number 21
    >> 
    >> answer 2) pch = c(1, NA) should do the trick.
    >> 
    >> legend(....., pch=c(21,NA), lwd=c(1,3), lty=c(1,3),
    >>               pt.bg="white", col=1:2)

    Dan> Ahhh... I tried pch=c(1,NULL), pt.bg='white' 
    Dan> I couldn't work out what was going on..

hmm, really,... at least you could have tried to see  what
c(1,NULL) is, by just "typing it at the prompt" !

Martin