Hi, using R64.1 the summary function for simple statistics of a vector gives inaccurate results for the maximum. Example: summary(c(123456,1,2,3)) gives : Min. 1st Qu. Median Mean 3rd Qu. Max. 1.00 1.75 2.50 30870.00 30870.00 123500.00 The Max value ist wrong in a mathematical sense. I've tried with S-Plus, it gives the same result, but this seems to be inaccurate. Any suggestions for this problem Chris -- Christoph M. Friedrich | mailto:friedrich at computer.org Gesellschaft f?r Modulfermenterbau mbH (GfM mbH) | http://www.tussy.uni-wh.de/~chris Alfred-Herrhausen Str. 44 ; D-58455 Witten, Germany -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._

Chris, Looking at the man page for summary,> ?summaryObject Summaries summary(object, ...) summary.default (object, ..., digits = max(3, .Options$digits -3)) summary.data.frame(object, maxsum = 7, ...) summary.factor (object, maxsum = 100, ...) summary.matrix (object, ...) Arguments: Shows that the "problem" is the digits option. It is 4 in your case, so you only see 4 significant digits. Change it to:> summary(c(123456,1,2,3), digits=7)Min. 1st Qu. Median Mean 3rd Qu. Max. 1.00 1.75 2.50 30865.50 30866.25 123456.00 and you get what you want. In most cases the number of "significant digits" printed out by summary methods in R is truncated to 3 or 4. robert On Wed, 9 Jun 1999, Christoph M. Friedrich wrote:> Hi, > using R64.1 the summary function for simple statistics of a vector gives > inaccurate > results for the maximum. > Example: > summary(c(123456,1,2,3)) > > gives : > > Min. 1st Qu. Median Mean 3rd Qu. Max. > 1.00 1.75 2.50 30870.00 30870.00 123500.00 > > The Max value ist wrong in a mathematical sense. I've tried with S-Plus, > it gives the same result, > but this seems to be inaccurate. > > Any suggestions for this problem > > Chris > > -- > Christoph M. Friedrich | mailto:friedrich at computer.org > Gesellschaft für Modulfermenterbau mbH (GfM mbH) | > http://www.tussy.uni-wh.de/~chris > Alfred-Herrhausen Str. 44 ; D-58455 Witten, Germany > -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- > r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html > Send "info", "help", or "[un]subscribe" > (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch > _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._ >-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._

On Wed, 9 Jun 1999, Christoph M. Friedrich wrote:> Hi, > using R64.1 the summary function for simple statistics of a vector gives > inaccurate > results for the maximum. > Example: > summary(c(123456,1,2,3)) > > gives : > > Min. 1st Qu. Median Mean 3rd Qu. Max. > 1.00 1.75 2.50 30870.00 30870.00 123500.00 > > The Max value ist wrong in a mathematical sense. I've tried with S-Plus, > it gives the same result, > but this seems to be inaccurate. > > Any suggestions for this problemThis is due to rounding to 4 significant figures. You can do eg R> summary(c(123456,1,2,3),digits=8) Min. 1st Qu. Median Mean 3rd Qu. Max. 1.00 1.75 2.50 30865.50 30866.25 123456.00 to get more accuracy Thomas Lumley Assistant Professor, Biostatistics University of Washington, Seattle -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._