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

[Daniel Malter]

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.