I have found a function (kudos to Barry Rowlingson) on this mailing list
that makes a circle. I have modified it to fit my needs. You can convert the
points into a polygon. You should be able to clip your rectangle with that.


circle <-  function(x = x, y = y, r = radius, n = n.faces){
        t <- seq(from = 0, to = 2 * pi, length = n + 1)[-1]
        t <- cbind(x = x + r * sin(t), y = y+ r * cos(t))
        t <- rbind(t, t[1,])
        return(t)
    }

HTH,
Roman



On Thu, May 27, 2010 at 12:00 PM, Quets Jan <Jan.Quets@ua.ac.be> wrote:

>
> Hi,
>
> I want to make a rectangular window with circular holes within.
> I have tried and searched but not found a solution yet.
>
> Can anybody help?
>
>
>
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-- 
In God we trust, all others bring data.

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