[Rd] legend's arguments "angle" and "density"

Martin Maechler maechler at stat.math.ethz.ch
Fri Aug 20 19:13:56 CEST 2004

```>>>>> "UweL" == Uwe Ligges <ligges at statistik.uni-dortmund.de>
>>>>>     on Fri, 20 Aug 2004 17:01:13 +0200 writes:

UweL> Paul Murrell wrote [on 2002-03-14 with Subject: "filled bars with
UweL> patterns" in reply to Arne Mueller]

>> Hi
>>
>> <snip>
>>
>>> I'd also like to have the filled boxes in the legend to be striped. The
>>> legend function has a 'density' attribute, but unfortunately this does't
>>> seem to do anything
>>>
>>> following the above example
>>>
>>> legend(3.4, 5, c('Axx','Bxx','Cxx','Dxx'), fill = c('red', 'blue',
>>> 'green', 'orange'))
>>>
>>> is the same as
>>>
>>> legend(3.4, 5, c('Axx','Bxx','Cxx','Dxx'), density=10, fill = c('red',
>>> 'blue', 'green', 'orange'),
>>> density=c(10,-1,20, 200))
>>
>>
>>
>> This appears to be a bug.  Can you file a bug report for this please?

UweL> [SNIP; I cannot find any related bug report in the repository]

UweL> I'm just reviewing bug reports and other stuff re. legend() and found
UweL> this old message in one of my Next-Week-To-Do-folders.

UweL> Well, the point mentioned above is not really a bug, because one has to
UweL> specify BOTH arguments, angle AND density in legend(). Is there any
UweL> point not to make angle = 45 the default, as it already is for polygon()
UweL> and rect()?

This seems like a good idea,
but we'll wait for your many other patches to legend.R and
legend.Rd   :-)

Martin

```