Robert.McGehee at geodecapital.com
2008-Oct-27 16:25 UTC
[Rd] S4 object does not commute? (PR#13209)
Hello all, It appears that for the simplest of S4 objects, z+1 does not equal 1+z. Presumably this is a bug, as 1+z seems to make a malformed object (at least malformed as an input to str). Thanks, Robert> setClass("test", representation("vector"))[1] "test"> z <- new("test", 1) > identical(z+1, 1+z)[1] FALSE> str(z+1)Formal class 'test' [package ".GlobalEnv"] with 1 slots ..@ .Data: num 2> str(1+z)Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 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'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Error: evaluation nested too deeply: infinite recursion / options(expressions=3D)?> R.version_ =20 platform x86_64-unknown-linux-gnu =20 arch x86_64 =20 os linux-gnu =20 system x86_64, linux-gnu =20 status =20 major 2 =20 minor 8.0 =20 year 2008 =20 month 10 =20 day 20 =20 svn rev 46754 =20 language R =20 version.string R version 2.8.0 (2008-10-20)
Simon Urbanek
2008-Oct-27 17:49 UTC
[Rd] Arith ops dropping S4 bit [Was: S4 object does not commute? (PR#13209)]
On Oct 27, 2008, at 12:25 , Robert.McGehee at geodecapital.com wrote:> Hello all, > It appears that for the simplest of S4 objects, z+1 does not equal > 1+z. > Presumably this is a bug, as 1+z seems to make a malformed object (at > least malformed as an input to str).FWIW the difference is that z+1 has the S4 bit set, 1+z does not. The objects are otherwise identical. AFAICS the same behavior is reproducible with any binary arithmetic operator (i.e. non-S4 %op% S4 will produce a result with S4 bit cleared yet valid S4 attributes). Cheers, S> >> setClass("test", representation("vector")) > [1] "test" >> z <- new("test", 1) >> identical(z+1, 1+z) > [1] FALSE >> str(z+1) > Formal class 'test' [package ".GlobalEnv"] with 1 slots > ..@ .Data: num 2 >> str(1+z) > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' Class 'test' Class 'test' Class 'test' Class 'test' Class > 'test' > Class 'test' Class 'test' Error: evaluation nested too deeply: > infinite > recursion / options(expressions=3D)? > >> R.version > _ =20 > platform x86_64-unknown-linux-gnu =20 > arch x86_64 =20 > os linux-gnu =20 > system x86_64, linux-gnu =20 > status =20 > major 2 =20 > minor 8.0 =20 > year 2008 =20 > month 10 =20 > day 20 =20 > svn rev 46754 =20 > language R =20 > version.string R version 2.8.0 (2008-10-20) > > ______________________________________________ > R-devel at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel > >
Possibly Parallel Threads
- Arith ops dropping S4 bit [Was: S4 object does not commute? (PR#13222)
- (PR#13209) Arith ops dropping S4 *and* 'object' bit [Was: ...]
- S4 setClass with prototypes " issues" (PR#8053)
- infinite recursion when printing former S4 objects
- S4 / S3 / Sweave problem