[R] Visualizing a Data Distribution -- Was: breaks in hist()

[bogdan romocea]

> > Leaf Sun wrote:
> > The histogram is highly screwed to the right, say, the range
> > of the vector is [0, 2], but 95% of the value is squeezed in
> > the interval (0.01, 0.2).

I guess the histogram is as you wrote. See
http://web.maths.unsw.edu.au/~tduong/seminars/intro2kde/
for a short explanation.


> -----Original Message-----
> From: Berton Gunter [mailto:gunter.berton at gene.com]
> Sent: Wednesday, November 02, 2005 1:10 PM
> To: 'Leaf Sun'; r-help at stat.math.ethz.ch
> Subject: [R] Visualizing a Data Distribution -- Was: breaks in hist()
>
>
> Leaf:
>
> An interesting question concerning graphical perception. As
> you have noted,
> choice of bin boundaries in a histogram can have a big effect on how a
> distribution is perceived. My $.02 (U.S.):
>
> Histograms are a relic of manual data plotting. We have much better
> alternatives these days that should be used instead. e.g.
>
> 1. (my preference, but properly not consumer-friendly). Plot
> the cdf instead
> (?ecdf) .
>
> 2. Plot a density estimator (?density ; ?densityplot)
>
> 3. See David Scott's ash package, perhaps the KernSmooth package also
> (though density() probably already has anything that you'd
> need from it).
>
> Cheers,
>
> -- Bert Gunter
> Genentech Non-Clinical Statistics
> South San Francisco, CA
>
> "The business of the statistician is to catalyze the
> scientific learning
> process."  - George E. P. Box
>
>
>
> > -----Original Message-----
> > From: r-help-bounces at stat.math.ethz.ch
> > [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Leaf Sun
> > Sent: Wednesday, November 02, 2005 9:49 AM
> > To: r-help at stat.math.ethz.ch
> > Subject: [R] breaks in hist()
> >
> > Dear listers,
> >
> > A quick question about breaks in hist().
> >
> > The histogram is highly screwed to the right, say, the range
> > of the vector is [0, 2], but 95% of the value is squeezed in
> > the interval (0.01, 0.2). My question is : how to set the
> > breaks then make the histogram look even?
> >
> > Thanks in advance,
> >
> > Leaf
> >
> >
>
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