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

[Erik Iverson]

jim holtman wrote:
> They are probably the same.  It isjust that summary is printing out 4
> significant digits.  Try:
> 
> options(digits = 20)

FYI, the default summary method also has its own digits argument.

> 
> 
> 
> 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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>>
> 
> 
>