Hi,
I've plotted this boxplot:
boxplot(a, ylab="Explosions", main="Boxplot")
points(a[1], pch=20, col="blue")
points(a[2], pch=20, col="blue")
points(a[3], pch=20, col="blue")
points(a[4], pch=20, col="blue")
points(a[5], pch=20, col="blue")
points(a[6], pch=20, col="blue")
points(a[7], pch=20, col="blue")
points(a[8], pch=20, col="blue")
points(a[9], pch=20, col="blue")
points(a[10], pch=20, col="blue")
Where a < c(5,15,10,7,9,11,13,9,10,12)

I would like to know how to use the command jitter ...
I've tried something like points(a[1], y=NULL, (jitter(a, factor=1, amount=NULL), pch=20, col="red") but it doesn't work... any idea? 
I would like to rotate the boxplot of 90°
Bye,
Bellico