Deleting Line from Plot in R
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just a quick question (I is R noob lolz). I'm trying to plot a graph in R and I have covered how to do that, but how do I delete a line I have just created? For instance: 

x <- c(1, 2, 4, 5, 6.7, 7, 8, 10 )

y <- c(40, 30, 10, 20, 53, 20, 10, 5)

plot(x,y,main="X vs Y", xlab="X", ylab="Y")

lines(x,y,col="black",lty="dotted") 

This produces a nice graph. However, say I would like to delete the line I created previously (or perhaps the points as well?!) how should I go about doing it? 

Cheers! 
