R\u306ewhich()\u95a2\u6570\u306f\u3001\u4e0e\u3048\u3089\u308c\u305f\u6761\u4ef6\u3092\u6e80\u305f\u3059\u5024\u306e\u4f4d\u7f6e\u307e\u305f\u306f\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u8fd4\u3057\u307e\u3059\u3002R\u306eWhich()\u95a2\u6570\u306f\u3001\u8ad6\u7406\u30d9\u30af\u30c8\u30eb\u5185\u306e\u5024\u306e\u4f4d\u7f6e\u3092\u8fd4\u3057\u307e\u3059\u3002\u4f4d\u7f6e\u306f\u3001\u884c\u3001\u5217\u3001\u30d9\u30af\u30c8\u30eb\u306a\u3069\u3001\u3042\u3089\u3086\u308b\u3082\u306e\u306b\u95a2\u3057\u3066\u793a\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
which\uff08\u30a6\u30a3\u30c3\u30c1\uff09\u95a2\u6570\uff1aR\u306ewhich\u95a2\u6570\u306f\u3001\u8ad6\u7406\u30d9\u30af\u30c8\u30eb\u5185\u306e\u5024\u306e\u4f4d\u7f6e\u3092\u8fd4\u3057\u307e\u3059\u3002<\/p>\n
which(<\/span>x,<\/span>arr.ind =<\/span> F,<\/span>useNames =<\/span> F)<\/span>\r\n<\/code><\/pre>\n\u3069\u3053<\/p>\n
\n- X = An input logical vector.<\/li>\n
- Arr.ind = Returns the array indices if x is an array.<\/li>\n
- useNames = Indicates the dimension names of an array.<\/li>\n<\/ul>\n
which()\u95a2\u6570\u306e\u7c21\u5358\u306a\u4f8b<\/h2>\n
\u3067\u306f\u3001\u95a2\u6570\u306e\u5b9a\u7fa9\u3068\u305d\u306e\u52d5\u4f5c\u306b\u3064\u3044\u3066\u7406\u89e3\u3057\u307e\u3057\u305f\u306d\u3002\u3055\u3042\u3001\u5b66\u3093\u3060\u3053\u3068\u3092\u5b9f\u969b\u306b\u9069\u7528\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u305d\u308c\u304c\u3069\u306e\u3088\u3046\u306b\u6a5f\u80fd\u3059\u308b\u304b\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002 (Sore ga dono y\u014d ni kin\u014d suru ka mite mimash\u014d.)<\/p>\n
which(<\/span>letters==<\/span>\"p\"<\/span>)<\/span>\r\n<\/code><\/pre>\n\u5341\u516d<\/p>\n
which(<\/span>letters==<\/span>\"n\"<\/span>)<\/span>\r\n<\/code><\/pre>\n\uff11\uff14<\/p>\n
which(<\/span>letters==<\/span>\"l\"<\/span>)<\/span>\r\n<\/code><\/pre>\n\uff11\uff12<\/p>\n
\u300cletters\u300d\u3068\u3044\u3046\u306e\u306f\u3001\u82f1\u8a9e\u306e\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u516826\u6587\u5b57\u304c\u9806\u756a\u306b\u4e26\u3093\u3060\u7d44\u307f\u8fbc\u307f\u5b9a\u6570\u3067\u3059\u3002<\/p>\n
\u4e0a\u8a18\u3067\u8868\u793a\u3055\u308c\u308b\u51fa\u529b\u306f\u3001\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u5185\u306e\u5404\u6587\u5b57\u306e\u4f4d\u7f6e\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u898b\u3066\u3044\u305f\u3060\u3051\u308b\u901a\u308a\u3001\u30a2\u30eb\u30d5\u30a1\u30d9\u30c3\u30c8\u306e\u300cp\u300d\u306f16\u756a\u76ee\u3067\u3042\u308a\u3001\u300cl\u300d\u3068\u300cn\u300d\u306f\u305d\u308c\u305e\u308c14\u756a\u76ee\u306812\u756a\u76ee\u3067\u3059\u3002<\/p>\n
\u4eca\u5ea6\u306fwhich\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u5b66\u3073\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u30d9\u30af\u30c8\u30eb\u3092\u4f7f\u7528\u3057\u3066which()\u95a2\u6570\u3092\u4f7f\u3046\u3002<\/h2>\n
\u4eca\u3001R\u8a00\u8a9e\u3067\u30d9\u30af\u30c8\u30eb\u3092\u4f5c\u6210\u3057\u3001\u305d\u306e\u5f8cwhich\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u4f4d\u7f6e\u3092\u8ffd\u8de1\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
#creating a vector <\/span>\r\ndf<-<\/span> c(<\/span>5<\/span>,<\/span>4<\/span>,<\/span>3<\/span>,<\/span>2<\/span>,<\/span>1<\/span>)<\/span>\r\n<\/code><\/pre>\n#Postion of 5<\/span>\r\nwhich(<\/span>df==<\/span>5<\/span>)<\/span>\r\n<\/code><\/pre>\n\u79c1\u306e\u540d\u524d\u306f\u30c8\u30e0\u3067\u3059\u3002<\/p>\n
#Position of 1<\/span>\r\nwhich(<\/span>df==<\/span>1<\/span>)<\/span>\r\n<\/code><\/pre>\n5\u3064<\/p>\n
#Position of values greater than 2\r\nwhich(df>2)\r\n<\/code><\/pre>\n\uff11\u3001\uff12\u3001\uff13\u3092\u65e5\u672c\u8a9e\u3067\u81ea\u7136\u306b\u8a00\u3044\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u3002\u305f\u3060\u3057\u3001\uff11\u3064\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3060\u3051\u3067\u69cb\u3044\u307e\u305b\u3093\u3002<\/p>\n
\u7d20\u6674\u3089\u3057\u3044\uff01R\u306ewhich()\u306f\u3001\u6307\u5b9a\u3055\u308c\u305f\u5165\u529b\u306e\u5024\u306e\u4f4d\u7f6e\u3092\u8fd4\u3057\u307e\u3059\u3002\u307e\u305f\u3001\u3053\u306e\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u7279\u5b9a\u306e\u6761\u4ef6\u3092\u6e21\u3057\u3001\u6761\u4ef6\u306b\u4e00\u81f4\u3059\u308b\u51fa\u529b\u306e\u4f4d\u7f6e\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u5148\u306e\u4f8b\u3067\u898b\u305f\u3088\u3046\u306b\u3001\u6761\u4ef6\u306b\u4e00\u81f4\u3059\u308b\u51fa\u529b\u306e\u4f4d\u7f6e\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u306bwhich()\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068<\/h2>\n
\u3055\u3066\u3001R\u8a00\u8a9e\u306b\u304a\u3044\u3066\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u306bwhich\u95a2\u6570\u3092\u3069\u306e\u3088\u3046\u306b\u9069\u7528\u3059\u308b\u304b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
df<-<\/span>datasets::<\/span>BOD\r\ndf\r\n<\/code><\/pre>\n Time demand\r\n1 1 8.3\r\n2 2 10.3\r\n3 3 19.0\r\n4 4 16.0\r\n5 5 15.6\r\n6 7 19.8\r\n<\/code><\/pre>\n\u3053\u306e\u76ee\u7684\u306e\u305f\u3081\u306b\u3001\u79c1\u305f\u3061\u306fBOD\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306b\u306f\u300cTime\u300d\u3068\u300cDemand\u300d\u3068\u3044\u30462\u3064\u306e\u5217\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306f\u5225\u306e\u7d44\u307f\u8fbc\u307f\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u3059\u3002<\/p>\n
\u300cwhich\u300d\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001\u30c7\u30fc\u30bf\u5185\u306e\u5024\u306e\u4f4d\u7f6e\u3092\u898b\u3064\u3051\u308b\u8a66\u307f\u3092\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
which(<\/span>df$<\/span>demand==<\/span>'10.3'<\/span>)<\/span>\r\n<\/code><\/pre>\n2\r\n<\/code><\/pre>\nwhich()\u95a2\u6570\u306b\u306f\u5024\u306e\u30ea\u30b9\u30c8\u3092\u5165\u529b\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u4f8b\u3092\u898b\u3066\u304f\u3060\u3055\u3044\u3002\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u304b\u30892\u3064\u306e\u5024\u306e\u4f4d\u7f6e\u3092\u898b\u3064\u3051\u3088\u3046\u3068\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
which(<\/span>df$<\/span>demand==<\/span>c(<\/span>8.3<\/span>,<\/span>16.0<\/span>)<\/span>)<\/span>\r\n<\/code><\/pre>\n1 4\r\n<\/code><\/pre>\nwhich()\u3092\u4f7f\u3063\u3066\u6570\u5024\u306e\u5024\u3092\u542b\u3080\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u306e\u5217\u3092\u898b\u3064\u3051\u308b\u3002<\/h2>\n
\u6570\u5024\u30c7\u30fc\u30bf\u3092\u542b\u3080\u30c7\u30fc\u30bf\u5185\u306e\u5217\u540d\u3092\u898b\u3064\u3051\u308b\u305f\u3081\u306b\u3001which() \u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n
R\u8a00\u8a9e\u3067\u306e\u52d5\u4f5c\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u305d\u306e\u305f\u3081\u306b\u3001\u79c1\u305f\u3061\u306f\u300cIris\u300d\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
df<-<\/span>datasets::<\/span>iris\r\ndf\r\n<\/code><\/pre>\n Sepal.Length Sepal.Width Petal.Length Petal.Width Species\r\n1 5.1 3.5 1.4 0.2 setosa\r\n2 4.9 3.0 1.4 0.2 setosa\r\n3 4.7 3.2 1.3 0.2 setosa\r\n4 4.6 3.1 1.5 0.2 setosa\r\n5 5.0 3.6 1.4 0.2 setosa\r\n6 5.4 3.9 1.7 0.4 setosa\r\n7 4.6 3.4 1.4 0.3 setosa\r\n8 5.0 3.4 1.5 0.2 setosa\r\n9 4.4 2.9 1.4 0.2 setosa\r\n10 4.9 3.1 1.5 0.1 setosa\r\n11 5.4 3.7 1.5 0.2 setosa\r\n<\/code><\/pre>\ntest<-<\/span>which(<\/span>sapply(<\/span>df,<\/span>is.numeric)<\/span>)<\/span>\r\ncolnames(<\/span>df)<\/span>[<\/span>test]<\/span>\r\n<\/code><\/pre>\n\"Sepal.Length\" \"Sepal.Width\" \"Petal.Length\" \"Petal.Width\" \r\n<\/code><\/pre>\n\u51fa\u529b\u306b\u3088\u308b\u3068\u3001\u30a2\u30e4\u30e1\u306e\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u306b\u306f5\u3064\u306e\u5217\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u3046\u30614\u3064\u306f\u6570\u5024\u5217\u3067\u3042\u308a\u30011\u3064\u306f\u30ab\u30c6\u30b4\u30ea\u30fc\uff08\u7a2e\uff09\u3067\u3059\u3002<\/p>\n
\u3053\u3053\u3067\u306f\u3001which() \u30e1\u30bd\u30c3\u30c9\u3068\u3068\u3082\u306b R \u306e sapply \u95a2\u6570\u3092\u4f7f\u7528\u3057\u307e\u3057\u305f\u3002<\/p>\n
which()\u95a2\u6570\u306f\u3001\u5165\u529b\u6761\u4ef6\u306b\u57fa\u3065\u3044\u3066\u6570\u5024\u306e\u5217\u306e\u540d\u524d\u306e\u307f\u3092\u8fd4\u3057\u307e\u3057\u305f\u3002\u3082\u3057\u30c7\u30fc\u30bf\u30a2\u30ca\u30ea\u30b9\u30c8\u3067\u3042\u308c\u3070\u3001which()\u95a2\u6570\u306f\u975e\u5e38\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n
R\u3067\u306e\u884c\u5217\u306e\u6a5f\u80fd\u306f\u4f55\u3067\u3059\u304b\uff1f (R de no gy\u014dretsu no kin\u014d wa nan desu ka?)<\/h2>\n
\u3064\u3044\u306b\u3001R\u306e\u884c\u5217\u306b\u5230\u7740\u3057\u307e\u3057\u305f\u3002R\u8a00\u8a9e\u3067\u306f\u3001which()\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u884c\u5217\u5185\u306e\u5024\u306e\u4f4d\u7f6e\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u307e\u305f\u3001\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306farr.index\u30d1\u30e9\u30e1\u30fc\u30bf\u30fc\u306b\u3064\u3044\u3066\u3082\u5b66\u3073\u307e\u3059\u3002<\/p>\n
\u307e\u305a\u7b2c\u4e00\u306b\u3001\u30de\u30c8\u30ea\u30c3\u30af\u30b9\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
df<-<\/span>matrix(<\/span>rep(<\/span>c(<\/span>1<\/span>,<\/span>0<\/span>,<\/span>1<\/span>)<\/span>,<\/span>4<\/span>)<\/span>,<\/span>nrow =<\/span> 4<\/span>)<\/span>\r\ndf\r\n<\/code><\/pre>\n [,1] [,2] [,3]\r\n[1,] 1 0 1\r\n[2,] 0 1 1\r\n[3,] 1 1 0\r\n[4,] 1 0 1\r\n<\/code><\/pre>\n\u3059\u3054\u3044\uff01\u304d\u308c\u3044\u306a\u884c\u5217\u3092\u4f5c\u6210\u3057\u305f\u306d\u3002\u304a\u3081\u3067\u3068\u3046\u3002\u305d\u308c\u3067\u306f\u3001which() \u3092\u4f7f\u3063\u3066\u884c\u5217\u5185\u306e\u5024 ‘0’ \u306e\u4f4d\u7f6e\u3092\u53d6\u5f97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
which(<\/span>df==<\/span>0<\/span>,<\/span>arr.ind =<\/span> T)<\/span>\r\n<\/code><\/pre>\n row col\r\n[1,] 2 1\r\n[2,] 1 2\r\n[3,] 4 2\r\n[4,] 3 3\r\n<\/code><\/pre>\n\u3046\u30fc\u3093\u3001\u3069\u306e\u95a2\u6570\u304c\u884c\u5217\u5185\u306e\u5024\u300c0\u300d\u306e\u4f4d\u7f6e\u3092\u8fd4\u3057\u3066\u304f\u308c\u305f\u304b\u306a\u3002<\/p>\n
\u6700\u521d\u306e\u300c0\u300d\u306e\u51fa\u73fe\u306f\u30012\u884c\u76ee\u306e1\u5217\u76ee\u3067\u3059\u3002\u6b21\u306b\u73fe\u308c\u308b\u306e\u306f\u30011\u884c\u76ee\u306e2\u5217\u76ee\u3067\u3059\u3002\u305d\u306e\u5f8c\u30014\u884c\u76ee\u306e2\u5217\u76ee\u3001\u6700\u5f8c\u306b\u306f3\u884c\u76ee\u306e3\u5217\u76ee\u306b\u73fe\u308c\u307e\u3059\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
R\u8a00\u8a9e\u306ewhich()\u95a2\u6570\u306f\u3001\u30c7\u30fc\u30bf\u5206\u6790\u3084\u30c7\u30fc\u30bf\u30de\u30a4\u30cb\u30f3\u30b0\u3067\u6700\u3082\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u308b\u95a2\u6570\u306e\u4e00\u3064\u3067\u3059\u3002<\/p>\n
\u95a2\u6570\u306f\u30c7\u30fc\u30bf\u5185\u306e\u5024\u306e\u4f4d\u7f6e\u3092\u793a\u3057\u307e\u3059\u3002\u5927\u91cf\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3063\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u7279\u5b9a\u306e\u5024\u306e\u4f4d\u7f6e\u3092\u898b\u3064\u3051\u308b\u306e\u304c\u96e3\u3057\u3044\u3067\u3057\u3087\u3046\u304c\u3001\u305d\u3053\u3067R\u306e which() \u95a2\u6570\u304c\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n
\u4eca\u306f\u4ee5\u4e0a\u3067\u3059\u3002\u7d20\u6674\u3089\u3057\u3044\u30dd\u30b8\u30b7\u30e7\u30cb\u30f3\u30b0\u3092\u304a\u697d\u3057\u307f\u304f\u3060\u3055\u3044\uff01(Ima wa ij\u014d desu. Subarash\u012b pojishoningu o o-tanoshimi kudasai!)<\/p>\n
\u3082\u3063\u3068\u8aad\u3080: R\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/p>\n","protected":false},"excerpt":{"rendered":"
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