Rの組み込み定数文字ベクトル、定数値等

  • 組込み定数文字ベクトル、定数値
> LETTERS
 [1] "A" "B" "C" "D" "E" "F" "G" "H" "I" "J" "K" "L" "M" "N" "O" "P" "Q" "R" "S"
[20] "T" "U" "V" "W" "X" "Y" "Z"
> letters
 [1] "a" "b" "c" "d" "e" "f" "g" "h" "i" "j" "k" "l" "m" "n" "o" "p" "q" "r" "s"
[20] "t" "u" "v" "w" "x" "y" "z"
> month.abb
 [1] "Jan" "Feb" "Mar" "Apr" "May" "Jun" "Jul" "Aug" "Sep" "Oct" "Nov" "Dec"
> month.name
 [1] "January"   "February"  "March"     "April"     "May"       "June"
 [7] "July"      "August"    "September" "October"   "November"  "December"
> options(digits=22); pi
[1] 3.141592653589793
  • 浮動小数演算関連定数値 .Machine
> noquote(unlist(format(.Machine)))
             double.eps          double.neg.eps             double.xmin
 2.2204460492503131e-16  1.1102230246251565e-16 2.2250738585072014e-308
            double.xmax             double.base           double.digits
1.7976931348623157e+308                       2                      53
        double.rounding            double.guard       double.ulp.digits
                      5                       0                     -52
  double.neg.ulp.digits         double.exponent          double.min.exp
                    -53                      11                   -1022
         double.max.exp             integer.max             sizeof.long
                   1024              2147483647                       4
        sizeof.longlong       sizeof.longdouble          sizeof.pointer
                      8                      12                       4
  • プラットフォーム仕様(Linux のケース) .Platform
    > noquote(unlist(format(.Platform)))
       OS.type   file.sep dynlib.ext        GUI     endian
          unix          /        .so        X11     little
    Mac OS X では
       OS.type   file.sep dynlib.ext        GUI     endian 
          unix          /        .so       AQUA        big 
  • コンパイル時の指定
    > capabilities()
        jpeg      png    tcltk      X11    GNOME     libz http/ftp  sockets 
        TRUE     TRUE     TRUE     TRUE    FALSE     TRUE     TRUE     TRUE 
      libxml     fifo   cledit  IEEE754    bzip2     PCRE 
        TRUE     TRUE     TRUE     TRUE     TRUE     TRUE
  • Rのバージョン
    > noquote(unlist(format(R.Version())))
             platform              arch                os            system 
    i686-pc-linux-gnu              i686         linux-gnu   i686, linux-gnu 
               status             major             minor              year 
                                      2               0.0              2004 
                month               day          language 
                   10                04                 R
    Mac OS X では
                   platform                    arch 
    powerpc-apple-darwin6.8                 powerpc 
                         os                  system 
                  darwin6.8      powerpc, darwin6.8 
                     status                   major 
                                                  2 
                      minor                    year 
                        0.0                    2004 
                      month                     day 
                         10                      04 
                   language 
                          R

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Last-modified: 2015-03-01 (日) 01:15:59 (1721d)