[R] Colour Lines

[Mark Miller]

I am plotting a cumulative plot of data with the fitted distribution's 
cumulative plot and I want to make it so that one or the other is in a 
different colour so that I can talk about which is which and, if possible, 
add a legend to the graph

x = seq(0,30,0.01)
plot(ecdf(IAT), do.point=FALSE, main = 'Cummlative Plot of Monday IATs\n for 
entire 15 Weeks')
lines(x, pexp(x,0.41562500))

Many thanks
Mark Miller