[R] plot focus

pdb philb at philbrierley.com
Wed Jun 30 12:26:30 CEST 2010

I am doing calculations in a loop and then plotting the results by adding a
point to each of 2 charts at the end of the loop. Its very informative as
you can see the progression through time.

My problem is, if I have 2 plots, I don't know how to get the focus back to
the first plot.


plot(iris[,1],col="red",) #plot1
plot(iris[,3],col="blue") #plot2

#goes on plot2

#how do I put this line on plot 1

I tried the method below but when you switch the focus back to screen 1 the
line gets drawn not where I expect

screen(1) # prepare screen 1 for output
plot(iris[,1],col="red",) #plot1
screen(2) # prepare screen 2 for output
plot(iris[,3],col="blue") #plot2



Any pointers please as to what I need to do?

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