# NOT RUN {
plot(x=c(0,30), y=c(0, 30));
# }
# NOT RUN {
draw.branch(c(5, 20, 12, 5, 5, 20),
c(5, 20, 10, 20, 25, 25),
c(10, 12, 20, 12, 10, 20),
c(12, 15, 5, 12, 25, 29),
border.linetype=c(1, 2, 3, 4,1,2),
border.width=c(1,2,1,2,2,2))
# }
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