> > On May 3, 2013, at 17:24 , jpm miao wrote: > >> I have a program, when I write >> >> if(num!=NA) >> > snipped On May 3, 2013, at 10:46 AM, peter dalgaard wrote: > Because comparison with an unknown value yields an unknown result. Anything else would violate the Second Law of Thermodynamics. We cannot have comparisons reducing entropy, now can we? Uncertainty cannot run uphill. -- David Winsemius Alameda, CA, USA ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
- Re: [R] Why can't R understand if(num!=NA)? S Ellison
- Re: [R] Why can't R understand if(num!=NA)? Leandro Marino
- Re: [R] Why can't R understand if(num!=NA)? David Carlson
- Re: [R] Why can't R understand if(num!=NA)? Marc Schwartz
- Re: [R] Why can't R understand if(num!=NA)? David Winsemius
- Re: [R] Why can't R understand if(num!=NA)? Berend Hasselman
- Re: [R] Why can't R understand if(num!=NA)? arun
- Re: [R] Why can't R understand if(num!=NA)? William Dunlap
- Re: [R] Why can't R understand if(num!=NA)? Kevin Wright
- Re: [R] Why can't R understand if(num!=NA)? peter dalgaard
- Re: [R] Why can't R understand if(num!=NA)? David Winsemius
- Re: [R] Why can't R understand if(num!=NA)? David Winsemius
- Re: [R] Why can't R understand if(num!=NA)? peter dalgaard
- Re: [R] Why can't R understand if(num!=NA)? David Winsemius
