[R] coloring individual points in lattice xyplot
ggrothendieck at gmail.com
Tue Jul 4 17:42:14 CEST 2006
If I wish to color groups in xyplot I can do this:
x <- 1:10
y <- cbind(x, x+1)
xyplot(y ~ rep(x,2), group = col(y), col = 1:2)
How do I color different points differently within a group.
For example, I want to produce this plot (except that I only
want to have two groups, not 11):
xyplot(y ~ rep(x,2), group = c(rep(1, 10), 2:11), col = 1:11)
I am thinking of something like this (although
this does not work, its just to get the idea across):
xyplot(y ~ rep(x,2), group = col(y), col = list(1, 2:11))
where, in general, I have a list with one component per group
whose elements are scalars to color the whole group or
vectors one color per point in the group. I don't know
ahead of time what the list is.
I am looking for a general approach to this within the lattice
xyplot plot framework; the above is just an example.
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