# [R] plot color question

Romain François francoisromain at free.fr
Mon Dec 6 22:55:57 CET 2004

```Hello

That would do the trick :

x <- rnorm(50)
y <- rnorm(50)
color <- rep("blue",50)
color[(x>0)&(y<0)] <-"red"
color[(x<0)&(y>0)] <-"green"
color[(x<0)&(y<0)] <-"yellow"
plot(x,y,col=color,pch=19)
abline(h=0) #just to check
abline(v=0) #just to check

Romain.

>Thanks again Andy and Uwe for you help on my previous
>post of ploting lm coef and means.  With your
>direction, I was able to expand and generalize the
>function to meet my requirements.
>
>Follow up question: Is it possible to make the points
>different colors depending on which quaderant they
>fall into?
>
>The data frame contains two variables (x and y)
>Quad 1 = x>mean(x) & y>mean(y) would be blue
>Quad 2 = x>mean(x) & y<mean(y) would be red
>Quad 3 = x<mean(x) & y>mean(y) ....
>Quad 4 = x<mean(x) & y<mean(y) ....
>
>Derek
>
>______________________________________________
>R-help at stat.math.ethz.ch mailing list
>https://stat.ethz.ch/mailman/listinfo/r-help
>
>
>
>

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