[R] superimpose density line over hist

[Liaw, Andy]

One thing to check:  Are the data in the same range as chisq with 4 df?

Andy

From: Albert Vilella
> Hi all,
> 
> I'm trying to superimpose a rchisq density line over a histogram with
> something like:
> 
> hist(alnlength)
> lines(density(rchisq(length(alnlength), 4)),col="red")
> 
> But the rchisq line won't appear anywhere,
> 
> Anyone knows what I am missing here?
> 
> Thanks in advance,
> 
>     Albert.
> 
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