[R] Re-binning histogram data

[Berton Gunter]

Charles: 

To be fair ... both histograms and densityplots are nonparametric density
estimators whose appearance and effectiveness are dependent on various
parameters. Neither are immune from misleading due to a poor choice of the
parameters. For histograms they are the bin boundaries; for kde's and
friends it is some version of bandwidth.

-- Bert
 
 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of 
> Charles Annis, P.E.
> Sent: Thursday, June 08, 2006 7:17 PM
> To: 'Justin Ashmall'; r-help at stat.math.ethz.ch
> Subject: Re: [R] Re-binning histogram data
> 
> Concerning the several comments on your note relating to 
> histograms, an
> informative and entertaining illustration, using Java, of how your
> subjective assessment of the data can change with different histograms
> constructed from the same data, is provided by R. Webster 
> West, recently
> with the Department of Statistics at the University of South 
> Carolina, but
> as of May 2006 with the Department of Statistics at Texas A & 
> M University,
> http://www.stat.sc.edu/~west/javahtml/Histogram.html  and
> http://www.stat.tamu.edu/~west/ 
> 
> 
> Charles Annis, P.E.
> 
> Charles.Annis at StatisticalEngineering.com
> phone: 561-352-9699
> eFax:  614-455-3265
> http://www.StatisticalEngineering.com
>  
> 
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Justin Ashmall
> Sent: Thursday, June 08, 2006 5:46 AM
> To: r-help at stat.math.ethz.ch
> Subject: [R] Re-binning histogram data
> 
> Hi,
> 
> Short Version:
> Is there a function to re-bin a histogram to new, broader bins?
> 
> Long version: I'm trying to create a histogram, however my 
> input-data is 
> itself in the form of a fine-grained histogram, i.e. numbers 
> of counts 
> in regular one-second bins. I want to produce a histogram of, say, 
> 10-minute bins (though possibly irregular bins also).
> 
> I suppose I could re-create a data set as expected by the 
> hist() function 
> (i.e. if time t=3600 has 6 counts, add six entries of 3600 to a list) 
> however this seems neither elegant nor efficient (though I'd 
> be pleased to 
> be mistaken!). I could then re-create a histogram as normal.
> 
> I guessing there's a better solution however! Apologies if 
> this is a basic 
> question - I'm rather new to R and trying to get up to speed.
> 
> Regards,
> 
> Justin
> 
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