[R] Bug? in summary( ) function base package

Mike Prager mike.prager at noaa.gov
Wed Apr 30 22:33:31 CEST 2008

"Richard Saba" <sabaric at auburn.edu> wrote:

> There seems to be an error in the summary() function when applied to "ts"
> class objects. The results of a call to summary( ), on the R  "ts" data set
> USAccDeaths , reports the wrong value for Max. The value reported by the
> summary function is 11320. The max( ) function returns the correct value
> 11317, the July 1993 value. Coercing the data to a data.frame and calling
> summary returns the correct max value. A search of R -help found a post in
> 2007 that mentioned a problem but attributed it to rounding errors. But this
> is too large a difference to account for a simple rounding error. 
> Has anyone else encountered the problem? Is there a workaround?

A documented feature of summary() is that it rounds values. In
doing so, it may print meaningless digits and thus give the
appearance of more precision than is really represented.

Mike Prager, NOAA, Beaufort, NC
* Opinions expressed are personal and not represented otherwise.
* Any use of tradenames does not constitute a NOAA endorsement.

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