Patrick reminded me that it's also in The R Inferno, another document that I need to read again.
So now, a more particular semi-question: x <- 1L y <- 1 z <- 1.0 class(x) # integer class(y) # numeric class(z) # numeric x == 1 x == 1L y == 1 z == 1 # all test TRUE Just to clarify, I think the steps above prove it, but *in a test* like x == 1 the test is for the contents, not the storage mode, not for a combination of storage mode and contents. So... The reason for defining the notion of "L" is smaller storage space, and more generally, for use anytime one wants explictly an integer for whatever reason? Are there other reasons, for instance, ways it saves lines of code? Bryan ************* Bryan Hanson Acting Chair Professor of Chemistry & Biochemistry DePauw University, Greencastle IN USA On 11/17/09 4:20 AM, "Patrick Burns" <pbu...@pburns.seanet.com> wrote: > 'The R Inferno' page 75. > > > > Patrick Burns > patr...@burns-stat.com > +44 (0)20 8525 0696 > http://www.burns-stat.com > (home of "The R Inferno" and "A Guide for the Unwilling S User") > > Bryan Hanson wrote: >> Gurus: >> >> I keep seeing other people¹s code that contain ideas like >> >> If (x == 2L) >> X[-1L] >> X - 1L >> >> I have some idea of what¹s going on, but where is the use of concepts like >> ³2L² documented? >> >> Thanks, Bryan >> ************* >> Bryan Hanson >> Acting Chair >> Professor of Chemistry & Biochemistry >> DePauw University, Greencastle IN 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. >> ______________________________________________ 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.
