plotrix

Sounds like you need gap.plot library(plotrix) par(bty=”n”) # deleting the box gap.plot(x,y, gap=c(2,7.5), gap.axis=”x”, pch=16, col=”blue”, ylim=range(c(y,z)), xtics=c(0:3,8:10), xticlab=c(0:3,8:10)) gap.plot(x,z, gap=c(2,7.5), gap.axis=”x”, pch=17, col=”red”, ylim=range(c(y,z)), add=TRUE); axis(2) abline(v=seq(1.99,2.09,.001), col=”white”) # hiding vertical lines axis.break(1,2,style=”slash”) # plotting slashes for breakpoints