[R] Histogram

[Duncan Murdoch]

On 04/09/2013 4:02 PM, philippe massicotte wrote:
> Thank you everyone.
> Try executing this:
> replicate(100, length(hist(rnorm(100), nclass = 10)$counts))
> I'm still not sure why the number of bins (classes) is not consistent.

R is behaving as documented.  You suggested 10 bins, but it finds for 
some datasets that a smaller or larger number gives better results.  If 
you really want exactly 10 bins, then specify where you want them.

Duncan Murdoch
> Thank in advance.
>
> > Date: Wed, 4 Sep 2013 20:27:36 +0100
> > From: ruipbarradas at sapo.pt
> > To: pmassicotte at hotmail.com
> > CC: r-help at r-project.org
> > Subject: Re: [R] Histogram
> >
> > Hello,
> >
> > See the arguments 'right' and 'include.lowest' of ?hist.
> > To give what you want, try instead
> >
> > h1 <- hist(1:10, 10)  # counts are 2, 1, 1, ...
> > h2 <- hist(1:10, breaks = 0:10)  # all counts are 1
> >
> >
> > and see the difference between h1 and h2, components 'breaks' and 'counts'.
> >
> > Hope this helps,
> >
> > Rui Barradas
> >
> > Em 04-09-2013 19:34, philippe massicotte escreveu:
> > > Hi everyone.
> > > I'm currently translating some Matlab code into R. However, I realized that the hsit function produce different results in both languages.
> > > in Matlab, hist(1:10, 10) will produce 10 bins with a count of 1 in each, but in R it will produce 9 classes with count of 2,1,1,1,1,1,1,1,1.
> > > I'm a bit embarrassed to ask such question, but why R is not producing 10 classes as requested?
> > > Thanks in advance,Phil 		 	   		
> > > 	[[alternative HTML version deleted]]
> > >
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> > >
>   		 	   		
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>
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