On Thu, 26 Feb 2004, David Thibault wrote:
> Hello all,
>
> I have a situation where I'd like to plot points from multiple groups of
> data in one plot. I'd like each group's points to be colored a different
> color. I've seen people comment on how you can alternate colors by
> providing a range of colors and then it will loop through each color as it
> plots individual points. However, that just goes by individual points and
> not by group.
>
Concatenate the groups into a single x vector and y vector, together with
a vector of group identifiers (eg 1,1,1,1,1,2,2,2,2,2,2,2,3,3), then
plot(y~x, col=group)
or to get more control
prettycolors<- c("forestgreen","goldenrod","sienna")
plot(y~x, col=prettycolors[group])
There are examples in demo(graphics).
-thomas
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