R help - May 2014 - From "deldir"

Dear all,
Please guide me in following situation.
I use these function from "deldir" package.

      x <- runif(20)
      y <- runif(20)
      z <- deldir(x,y,rw=c(0,1,0,1))
      w <- tile.list(z)
      plot(w)
      ccc <- heat.colors(2) 
      plot(w,fillcol=ccc,close=TRUE)


Is each cell red with prob 1/2? or cells were colored deterministic?

Faithfully yours,
E. Daadmehr

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On 18/05/14 03:56, Elham Daadmehr wrote:
> Dear all,
> Please guide me in following situation.
> I use these function from "deldir" package.
>
>        x <- runif(20)
>        y <- runif(20)
>        z <- deldir(x,y,rw=c(0,1,0,1))
>        w <- tile.list(z)
>        plot(w)
>        ccc <- heat.colors(2)
>        plot(w,fillcol=ccc,close=TRUE)
>
>
> Is each cell red with prob 1/2? or cells were colored deterministic?
The colours are (in some sense) deterministic.  The tiles are plotted in 
the order in which the points appear in the data set.  The fillcol 
vector is "recycled" to give a vector of length equal to the number of
points.  Thus the tile corresponding to (x[1],y[1]) gets coloured with 
the colour given by ccc[1].  The tile corresponding to (x[2],y[2]) gets 
coloured with the colour given by ccc[2].  The tile corresponding to 
(x[3],y[3]) gets coloured with the colour given by ccc[1] again.  The 
tile corresponding to (x[4],y[4]) gets coloured with the colour given by 
ccc[2] again.  And so on.

cheers,

Rolf Turner