[R] Selective Plot Color

[Chuck Cleland]

On 1/27/2010 10:00 AM, Richardson, Patrick wrote:
> Is there a way (with a simple plot) to select all observations greater than a certain value and plot them with a different color than the rest of the observations in the plot? (i.e. for all observations greater than 10, I want to plot them in red, but the rest of the observations remain black. Where can I find how to do this?
> 
> Patrick

X <- runif(30, min=5, max=15)

Y <- rnorm(30)

plot(X, Y, col=ifelse(X > 10, 'red', 'black'), pch=16)

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Chuck Cleland, Ph.D.
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