Re: [R] Precision of summary() when summarizing variables in a data frame

From: jim holtman <jholtman_at_gmail.com>
Date: Tue, 05 Apr 2011 12:48:48 -0400

They are probably the same. It isjust that summary is printing out 4 significant digits. Try:

options(digits = 20)

On Tue, Apr 5, 2011 at 12:38 PM, Daniel Malter <daniel_at_umd.edu> wrote:
> Hi,
>
> I summary() a variable with 409908 numeric observations. The variable is
> part of a data.frame. The problem is that the min and max returned by
> summary() do not equal the ones returned by min() and max(). Does anybody
> know why that is?
>
>> min(data$vc)
> [1] 15452
>> max(data$vc)
> [1] 316148
>> summary(data$vc)
>   Min. 1st Qu.  Median    Mean 3rd Qu.    Max.
>  15450   21670   40980   55500   63880  316100
>
>
> sessionInfo()
> R version 2.11.1 (2010-05-31)
> x86_64-apple-darwin9.8.0
>
> locale:
> [1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods   base
>
> other attached packages:
> [1] sqldf_0.3-5           chron_2.3-39          gsubfn_0.5-5
> [4] proto_0.3-8           RSQLite.extfuns_0.0.1 RSQLite_0.9-4
> [7] DBI_0.2-5
>
> Thanks much,
> Daniel
>
> --
> View this message in context: http://r.789695.n4.nabble.com/Precision-of-summary-when-summarizing-variables-in-a-data-frame-tp3428570p3428570.html
> Sent from the R help mailing list archive at Nabble.com.
>
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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>

-- 
Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?

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Received on Tue 05 Apr 2011 - 16:50:52 GMT

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