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rhistogramlinesdensity-plot

The 'lines' command in R

Just a quick question: I'm trying to add a density line to my histogram

lines(x,dbeta(x,6,3))

I've previously defined:

 x = runif(100000,0,1)

However rather than 'joining the dots' of the beta distribution, it 'fills in with colour' the whole are under it. So I'm basically left with a coloured in beta distribution overlayed on my histogram.

I've tried changing the line types, but this doesn't seem to help. How can I just make it into a single-lined overlayed plot?

Solution

  • you are plotting pairs of random numbers with it's corresponding density... if you simply want to overlay the line, don't use runif(), but seq():

    x <- seq(from=0, to=1, length.out=10000)
lines(x, dbeta(x, 6,3))