[R] rootogram for normal distributions

Hadley Wickham hadley at rice.edu
Sun Jan 16 15:44:14 CET 2011

> The normal distribution is a continuous distribution, i.e., the frequency
> for each observed value will essentially be 1/n and not converge to the
> density function. Hence, you would need to look at histogram or smoothed
> densities. Rootograms, on the other hand, are intended for discrete
> distributions.

I don't think that's true - rootograms are useful for both continuous
and discrete distributions.  See (e.g.) p 314 at
http://www.edwardtufte.com/tufte/tukey, where Tukey himself uses a
rootogram with a normal distribution.


Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University

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