R help - Aug 2009 - How to generate more triangles in sequences?

Hi everyone,
I want to plot some pattern. For example, I have some coding as below,

plot(0:11,type="n")
polygon(c(6,8,10), c(7,3,5),bor=6)
polygon(c(2,4,6), c(5,3,7),bor=6)
polygon(c(6,10,8), c(7,9,11),bor=6)
polygon(c(2,6,4), c(9,7,11),bor=6)

This coding will give me four triangles, but how to generate more triangles
in sequences so
that not need to mention the coordinate for each triangle?

Thank you.

-- 
Hemavathi Ramulu

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On Aug 23, 2009, at 11:29 PM, Hemavathi Ramulu wrote:
> Hi everyone,
> I want to plot some pattern. For example, I have some coding as below,
>
> plot(0:11,type="n")
> polygon(c(6,8,10), c(7,3,5),bor=6)
> polygon(c(2,4,6), c(5,3,7),bor=6)
> polygon(c(6,10,8), c(7,9,11),bor=6)
> polygon(c(2,6,4), c(9,7,11),bor=6)
>
> This coding will give me four triangles, but how to generate more  
> triangles
> in sequences so
> that not need to mention the coordinate for each triangle?
plot(0:11,type="n")
for (i in 1:10 ) polygon (sample(1:10, 3), sample(1:10, 3), bor=6)

or perhaps:

  plot(0:11,type="n")
  for (i in 1:10 ) polygon (i*c(.2, .6, .8), i*c(.9,.7, 1.1), bor=6)

-- 

David Winsemius, MD
Heritage Laboratories
West Hartford, CT