[R] deldir package - voronoi
zubin
binabina at bellsouth.net
Sun Aug 12 03:22:28 CEST 2007
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.
Code below:
library(deldir)
set.seed(1)
#generate data
y <- runif(20)
x <- runif(20)
z <- rep((2:4),2)
#run voronoi from deldir package
ddd <- deldir(x,y)
ttt <- tile.list(ddd)
plot.deldir(ddd,wlines="tess")
#play with colors
plot(ttt,polycol=z,close=TRUE)
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