[R] Scatterplot with the 3rd dimension = color?

[Kerry]

Yes, perfect! This I can work with.

Thanks,
KB

On Oct 2, 3:55 pm, Duncan Murdoch <murdoch.dun... at gmail.com> wrote:
> On 11-10-02 1:11 PM, Kerry wrote:
>
> > I have 3 columns of data and want to plot each row as a point in a
> > scatter plot and want one column to be represented as a color gradient
> > (e.g. larger  values being more red). Anyone know the command or
> > package for this?
>
> It's not a particularly effective display, but here's how to do it.  Use
> rainbow(101) in place of rev(heat.colors(101)) if you like.
>
> x <- rnorm(10)
> y <- rnorm(10)
> z <- rnorm(10)
> colors <- rev(heat.colors(101))
> zcolor <- colors[(z - min(z))/diff(range(z))*100 + 1]
> plot(x,y,col=zcolor)
>
> Duncan Murdoch
>
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