R help - Dec 2015 - fill the area outside a polygon

On Wed, Dec 2, 2015 at 5:19 PM, David L Carlson <dcarlson at tamu.edu>
wrote:
>
> Using only base graphics, one solution would be to embed the inner
polygon in the outer one and turn off the border:
>
> par(mai=c(0, 0, 0, 0))
> plot(1:100, type="n")
> polygon(c(0, 100, 100, 0, 0, 20, 80, 80, 20, 20, 0),
>      c(0, 0, 100, 100, 0, 20, 20, 80, 80, 20, 0),
col="lightblue",
border=NA)


I see what you did, interesting.
I do need the border though, although if this is the only solution, perhaps
I could live without it.

It's working on a Windows machine (which I presume you are using), but
under MacOS I only get  the entire big polygon filled, including the hole
in the middle.

Thanks,
Adrian

--
Adrian Dusa
University of Bucharest
Romanian Social Data Archive
Soseaua Panduri nr.90
050663 Bucharest sector 5
Romania

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Adrian,

Draw the polygon once without the border and the whole in it, then go
back and draw the border around the outer polygon without any fill.

On Wed, Dec 2, 2015 at 9:31 AM, Adrian Du?a <dusa.adrian at unibuc.ro>
wrote:
> On Wed, Dec 2, 2015 at 5:19 PM, David L Carlson <dcarlson at
tamu.edu> wrote:
>>
>> Using only base graphics, one solution would be to embed the inner
> polygon in the outer one and turn off the border:
>>
>> par(mai=c(0, 0, 0, 0))
>> plot(1:100, type="n")
>> polygon(c(0, 100, 100, 0, 0, 20, 80, 80, 20, 20, 0),
>>      c(0, 0, 100, 100, 0, 20, 20, 80, 80, 20, 0),
col="lightblue",
> border=NA)
>
>
> I see what you did, interesting.
> I do need the border though, although if this is the only solution, perhaps
> I could live without it.
>
> It's working on a Windows machine (which I presume you are using), but
> under MacOS I only get  the entire big polygon filled, including the hole
> in the middle.
>
> Thanks,
> Adrian
>
> --
> Adrian Dusa
> University of Bucharest
> Romanian Social Data Archive
> Soseaua Panduri nr.90
> 050663 Bucharest sector 5
> Romania
>
>         [[alternative HTML version deleted]]
>
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> and provide commented, minimal, self-contained, reproducible code.


-- 
Gregory (Greg) L. Snow Ph.D.
538280 at gmail.com

Hi Greg,

On Wed, Dec 2, 2015 at 10:28 PM, Greg Snow <538280 at gmail.com>
wrote:
>
> Adrian,
>
> Draw the polygon once without the border and the whole in it, then go
> back and draw the border around the outer polygon without any fill.
I thought about it too, but this only works on a Windows machine.
On a MacOS, the polygon() function doesn't help very much, apparently.

Best wishes,
Adrian

--
Adrian Dusa
University of Bucharest
Romanian Social Data Archive
Soseaua Panduri nr.90
050663 Bucharest sector 5
Romania

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