[R] deldir package - voronoi

[zubin]

Team, we figured this out, Roger at XLSOLUTIONS solved the puzzle for 
us..!!  Okay you can easily change the color palette.

see below:

library(MASS)
library(deldir)

set.seed(1123)

y <- runif(20)
x <- runif(20)

#run voronoi from deldir package
ddd <- deldir(x,y)
ttt <- tile.list(ddd)
plot.deldir(ddd,wlines="tess")

#play with colors
*ccc <- colors()[1:20] or ccc <-heat.colors(20) or ccc <-terrain.colors(20)*
plot(ttt,polycol=ccc,close=T)


Rolf Turner wrote:
>
> On 12/08/2007, at 1:22 PM, zubin wrote:
>
>> Hello!
>>
>> I am using the deldir package to visualize my data, pretty neat.
>> However, i need to fill the colors using polycol =, fill with colors
>> like a heatmap - more of a gradient fill.   The only colors i get are
>> very blocky - how do i assign the correct colors for a gradient, even a
>> grayscale?  i tried the chart of R colors, using 200 numbers for
>> grayscale but not getting them.  The polycol = colors the cells in the
>> tesselation with the value a specific vector for color.
>
>     <snip>
>
> I'm sorry, but I can't help here.  I've been struggling with colors, 
> in a different
> context, recently myself, and I'm unclear as to how they work.  There 
> are a bunch
> of functions --- palette(), colorRamp(), colorRampPalette() that 
> probably relate
> to what you want to do, but I'm not sure just *how* they relate.
>
> With a bit of luck, someone cleverer than I will come to your rescue.
>
>                 cheers,
>
>                     Rolf Turner
>
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