Rの組み込み定数文字ベクトル、定数値 の変更点

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• Rの組み込み定数文字ベクトル、定数値 へ行く。
• Rの組み込み定数文字ベクトル、定数値 の差分を削除

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SIZE(18){COLOR(blue){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
 > noquote(unlist(format(.Platform)))
    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