# Problems with edges in R plotting

I'm having a hard time dealing with *cutting edges* in *R* plots.
The problem:
Edge problem http://i57.tinypic.com/rsas14.jpg
Code:

x <- c(130, 145, 170, 175, 180) y <- c(0.00172225, 0.00207025, 0.002304, 0.0025, 0.002704)*1000 plot(x,y,pch=20) fit <- lm(y~x) xx <- seq(120,190, length=50) plot(x,y,xlab=(expression('U'~~'[V]')),main=expression(atop(Something)), ylab=expression(r[1]^2~~"[mm]"),pch=19,xlim=c(120, 190), ylim=c(0.001,0.003)*1000) xHigh <- x+5 yHigh <- y+c(0.083, 0.091, 0.096, 0.100, 0.104) xLow <- x-5 yLow <- y-c(0.083, 0.091, 0.096, 0.100, 0.104) eps <- 1 eps2 <- 0.05 segments(x-eps,yLow,x+eps,yLow,col=2) segments(x-eps,yHigh,x+eps,yHigh,col=2) segments(xLow,y-eps2,xLow,y+eps2,col=2) segments(xHigh,y-eps2,xHigh,y+eps2,col=2) segments(x,yLow,x,yHigh,col=2) segments(xLow,y,xHigh,y,col=2) lines(xx, predict(fit, data.frame(x=xx)), col="blue") summary(fit)

How can I resolve this problem? Thanks in advance!

## Answers

Before your plot(), increase the size of your left margin:

par(mar=c(5,5,4,2)+.1) plot(x,y,pch=20)

Base graphics simply provide a fixed number of lines on each side of the plot regardless of what you attempt to draw there.