[R] Ploting NA location points

[R.E. Darnell]

Kenneth Cabrera <krcabrer at epm.net.co> writes:


[...]

> 
> How can I plot a x,y coordinates, but to plot a "z" variable
> with a different color if it is a z missing value (NA)?
> 

[...]

Start with
 
plot(x[!is.na(z)],y[!is.na(z)],xlim=range(x),ylim=range(y))
points(x[is.na(z)],y[is.na(z)],col=2)


Ross Darnell
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