R help - Oct 2011 - Scatterplot with the 3rd dimension = color?

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?

Thanks,
KB

Here is one:
http://cran.r-project.org/web/packages/scatterplot3d/index.html

In the future, consider first searching:
http://finzi.psych.upenn.edu/search.html
http://rseek.org/

etc...



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On Sun, Oct 2, 2011 at 7:11 PM, Kerry <kbrownk@gmail.com> 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?
>
> Thanks,
> KB
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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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