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Sorry if my terminology is all out of sorts here, but I'm curious about a simple matter: I have a plot, and within it a box defined by lines, like so: plot(c(), xlim=c(-1.5,1.5), ylim=c(0,5)) lines(c(1,1,-1,-1,1),c(1.5,3.5,3.5,1.5,1.5), col=c("red")) I'd like to easily chop the box drawn by lines into an even 3x3 grid- is this possible easily? Thanks! -- Wells Oliver