[R] Complex plotting problem
Jim Lemon
jim at bitwrit.com.au
Thu Nov 2 11:05:11 CET 2006
Wee-Jin Goh wrote:
> Hello,
>
> I would like to make a plot (preferably lines, but points will do
> too), where the line segment changes color depending on the value of
> the y-axis. For example, let's suppose the y-axis range is from -1 to
> 1. Points close to -1 would be colored blue, while points close to 1
> will be colored red. Points in between will be varying degrees of
> blue/red depending on how close they are to -1 or +1.
>
> If the above is not possible, would it be possible to set a decision
> boundary on the plot, where any point above this boundary will be a
> particular color, and any point below will be a different color?
>
> Any suggestions as to how I might accomplish this would be much
> appreciated.
>
Have a look at the examples for color.scale and color.scale.lines in the
plotrix package.
Jim
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