Add function to histogram?

Hello,

E.g. with lines() or add a new plot to the current plot with par(new = TRUE)  (and set equal xlim and ylins??s in the plot function)

r <- rnorm(100)
hist(r,freq=FALSE)
lines(density(r))

Best,
Matthias

Is there any neat way to add a curve (frequency function or 
the like) to a histogram or other plots? I haven't found one yet...

Robert

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