schlather at hsu-hh.de
2006-Mar-30 10:34 UTC
[Rd] function min does not return correct result if .Machine$integer.max is involved (PR#8731)
Full_Name: Martin Schlather Version: 2.2.0 and alpha 2.3.0 (06/3/29) OS: Linux (x86_64 and Intel) Submission from: (NULL) (139.11.183.106)> min(.Machine$integer.max, 10^20)[1] 1e+20> min(as.integer(.Machine$integer.max), 10^20)[1] 1e+20 but> min(.Machine$integer.max + 0, 10^20)[1] 2147483647> min(as.integer(.Machine$integer.max - 1), 10^20)[1] 2147483646> min(as.double(.Machine$integer.max), 10^20)[1] 2147483647 Cheers, Martin
Peter Dalgaard
2006-Mar-30 11:38 UTC
[Rd] function min does not return correct result if .Machine$integer.max is involved (PR#8731)
schlather at hsu-hh.de writes:> Full_Name: Martin Schlather > Version: 2.2.0 and alpha 2.3.0 (06/3/29) > OS: Linux (x86_64 and Intel) > Submission from: (NULL) (139.11.183.106) > > > > min(.Machine$integer.max, 10^20) > [1] 1e+20 > > > min(as.integer(.Machine$integer.max), 10^20) > [1] 1e+20 > > > but > > min(.Machine$integer.max + 0, 10^20) > [1] 2147483647 > > > min(as.integer(.Machine$integer.max - 1), 10^20) > [1] 2147483646 > > > min(as.double(.Machine$integer.max), 10^20) > [1] 2147483647I have a vague recollection that we might have used .Machine$integer.max to represent "integer infinity" at some point. If so, then the results make some sense, but we don't seem to have similar conventions in any other places that I can think of (i.e. as.integer(Inf) is NA, etc.) -- O__ ---- Peter Dalgaard ?ster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907