{"id":464,"date":"2023-07-29T19:49:15","date_gmt":"2023-07-29T19:49:15","guid":{"rendered":"https:\/\/statorials.org\/ja\/r%e3%81%aesample%e9%96%a2%e6%95%b0%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%a6%e3%82%b5%e3%83%b3%e3%83%95%e3%82%9a%e3%83%ab%e3%82%92%e7%94%9f%e6%88%90%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/"},"modified":"2023-07-29T19:49:15","modified_gmt":"2023-07-29T19:49:15","slug":"r%e3%81%aesample%e9%96%a2%e6%95%b0%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%a6%e3%82%b5%e3%83%b3%e3%83%95%e3%82%9a%e3%83%ab%e3%82%92%e7%94%9f%e6%88%90%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/statorials.org\/ja\/r%e3%81%aesample%e9%96%a2%e6%95%b0%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%a6%e3%82%b5%e3%83%b3%e3%83%95%e3%82%9a%e3%83%ab%e3%82%92%e7%94%9f%e6%88%90%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/","title":{"rendered":"R \u306e sample \u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30b5\u30f3\u30d7\u30eb\u3092\u751f\u6210\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"

<\/p>\n

\n

R \u306esample()<\/strong>\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u7f6e\u63db\u306e\u6709\u7121\u306b\u304b\u304b\u308f\u3089\u305a\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u307e\u305f\u306f\u30d9\u30af\u30c8\u30eb\u304b\u3089\u8981\u7d20\u306e\u30e9\u30f3\u30c0\u30e0\u306a\u30b5\u30f3\u30d7\u30eb\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n

sample() \u95a2\u6570\u306e\u57fa\u672c\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/span><\/p>\n

\u30b5\u30f3\u30d7\u30eb (x\u3001\u30b5\u30a4\u30ba\u3001\u7f6e\u63db = FALSE<\/span> \u3001\u78ba\u7387 = NULL<\/span> )<\/span><\/strong><\/p>\n

x<\/strong> : \u30b5\u30f3\u30d7\u30eb\u3092\u9078\u629e\u3059\u308b\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u307e\u305f\u306f\u30d9\u30af\u30c8\u30eb<\/span>
\u30b5\u30a4\u30ba<\/strong>\uff1a\u30b5\u30f3\u30d7\u30eb\u30b5\u30a4\u30ba<\/span>
replace<\/strong> : \u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u306f\u7f6e\u63db\u3068\u3068\u3082\u306b\u5b9f\u884c\u3055\u308c\u308b\u3079\u304d\u3067\u3059\u304b? (\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f FALSE \u3067\u3059)<\/span>
prob<\/strong> : \u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u3055\u308c\u305f\u30d9\u30af\u30c8\u30eb\u306e\u8981\u7d20\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306e\u78ba\u7387\u91cd\u307f\u306e\u30d9\u30af\u30c8\u30eb<\/span><\/p>\n

sample() \u306e\u5b8c\u5168\u306a\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306f\u3053\u3053\u306b<\/a>\u3042\u308a\u307e\u3059\u3002<\/em><\/span><\/p>\n

\u6b21\u306e\u4f8b\u306f\u3001sample() \u3092\u4f7f\u7528\u3059\u308b\u5b9f\u969b\u306e\u4f8b\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n

\u30d9\u30af\u30bf\u30fc\u304b\u3089\u30b5\u30f3\u30d7\u30eb\u3092\u751f\u6210\u3059\u308b<\/span><\/strong><\/h2>\n

10 \u500b\u306e\u8981\u7d20\u3092\u542b\u3080\u30d9\u30af\u30c8\u30eba<\/em>\u304c\u3042\u308b\u3068\u3057\u307e\u3059\u3002<\/span><\/p>\n

 #define vector a<\/em> with 10 elements in it<\/span>\na <- c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)<\/strong><\/pre>\n
\u30d9\u30af\u30c8\u30eba<\/em>\u306e 5 \u3064\u306e\u8981\u7d20\u306e\u30e9\u30f3\u30c0\u30e0\u306a\u30b5\u30f3\u30d7\u30eb\u3092\u7f6e\u63db\u306a\u3057\u3067\u751f\u6210\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u69cb\u6587\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n
 #generate random sample of 5 elements from vector a\n<\/em><\/span>sample(a, 5)\n\n#[1] 3 1 4 7 5<\/strong><\/pre>\n
\u30e9\u30f3\u30c0\u30e0\u306a\u30b5\u30f3\u30d7\u30eb\u3092\u751f\u6210\u3059\u308b\u305f\u3073\u306b\u3001\u6bce\u56de\u7570\u306a\u308b\u30a2\u30a4\u30c6\u30e0\u306e\u30bb\u30c3\u30c8\u304c\u5f97\u3089\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3059\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/span><\/p>\n
 #generate another random sample of 5 elements from vector a\n<\/em><\/span>sample(a, 5)\n\n#[1] 1 8 7 4 2<\/strong><\/pre>\n
\u7d50\u679c\u3092\u8907\u88fd\u3057\u3066\u6bce\u56de\u540c\u3058\u30b5\u30f3\u30d7\u30eb\u3092\u4f7f\u7528\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u305f\u3044\u5834\u5408\u306f\u3001 set.seed()<\/strong>\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n
 #set.seed(some random number) to ensure that we get the same sample each time\nset.seed(122)\n\n#define vector a<\/em> with 10 elements in it<\/span>\na <- c(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)<\/span>\n\n#generate random sample of 5 elements from vector a\n<\/em><\/span>sample(a, 5)\n\n#[1] 10 9 2 1 4\n\n#generate another random sample of 5 elements from vector a\n<\/em><\/span>sample(a, 5)\n\n#[1] 10 9 2 1 4\n<\/strong><\/pre>\n
 replace = TRUE<\/strong>\u5f15\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001\u7f6e\u63db\u3092\u4f7f\u7528\u3057\u3066\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u30d9\u30af\u30c8\u30eb\u306e\u5404\u8981\u7d20\u3092\u30b5\u30f3\u30d7\u30eb\u5185\u306b\u8907\u6570\u56de\u51fa\u73fe\u3059\u308b\u3088\u3046\u306b\u9078\u629e\u3067\u304d\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/span><\/p>\n
 #generate random sample of 5 elements from vector a<\/em> using sampling with replacement\n<\/span>sample(a, 5, replace = TRUE)\n\n#10 10 2 1 6<\/strong><\/pre>\n
\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u304b\u3089\u30b5\u30f3\u30d7\u30eb\u3092\u751f\u6210\u3059\u308b<\/span><\/strong><\/h2>\n
Sample() \u95a2\u6570\u306e\u3082\u3046 1 \u3064\u306e\u4e00\u822c\u7684\u306a\u4f7f\u7528\u6cd5\u306f\u3001\u30c7\u30fc\u30bf \u30bb\u30c3\u30c8\u304b\u3089\u884c\u306e\u30e9\u30f3\u30c0\u30e0 \u30b5\u30f3\u30d7\u30eb\u3092\u751f\u6210\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u6b21\u306e\u4f8b\u3067\u306f\u3001\u5408\u8a08 150 \u884c\u3042\u308b\u7d44\u307f\u8fbc\u307f R \u30c7\u30fc\u30bf\u30bb\u30c3\u30c8iris<\/strong>\u304b\u3089 10 \u884c\u306e\u30e9\u30f3\u30c0\u30e0 \u30b5\u30f3\u30d7\u30eb\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/span><\/p>\n
 #view first 6 rows of<\/span> iris dataset\n<\/span><\/strong>head(iris)<\/span>\n\n# Sepal.Length Sepal.Width Petal.Length Petal.Width Species\n#1 5.1 3.5 1.4 0.2 setosa\n#2 4.9 3.0 1.4 0.2 setosa\n#3 4.7 3.2 1.3 0.2 setosa\n#4 4.6 3.1 1.5 0.2 setosa\n#5 5.0 3.6 1.4 0.2 setosa\n#6 5.4 3.9 1.7 0.4 setosa<\/span><\/strong>\n\n<\/span>#set<\/span> seed to ensure that this example is replicable<\/strong>\nset.seed(100)<\/span>\n<\/span>\n#choose a random vector of 10 elements from all 150 rows in iris dataset<\/span>\nsample_rows <- sample(1:nrow(iris), 10)\nsample_rows\n\n#[1] 47 39 82 9 69 71 117 53 78 25\n\n#choose the 10 rows of the iris dataset that match the row numbers above<\/span>\nsample <- iris[sample_rows, ]\nsample\n\n# Sepal.Length Sepal.Width Petal.Length Petal.Width Species\n#47 5.1 3.8 1.6 0.2 setosa\n#39 4.4 3.0 1.3 0.2 setosa\n#82 5.5 2.4 3.7 1.0 versicolor\n#9 4.4 2.9 1.4 0.2 setosa\n#69 6.2 2.2 4.5 1.5 versicolor\n#71 5.9 3.2 4.8 1.8 versicolor\n#117 6.5 3.0 5.5 1.8 virginica\n#53 6.9 3.1 4.9 1.5 versicolor\n#78 6.7 3.0 5.0 1.7 versicolor\n#25 4.8 3.4 1.9 0.2 setosa<\/strong><\/pre>\n
\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3092\u30b3\u30d4\u30fc\u3057\u3066\u72ec\u81ea\u306e R \u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u8cbc\u308a\u4ed8\u3051\u308b\u3068\u3001\u6bce\u56de\u540c\u3058\u30b5\u30f3\u30d7\u30eb\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306bset.seed(100)<\/strong>\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u307e\u3063\u305f\u304f\u540c\u3058\u30b5\u30f3\u30d7\u30eb\u304c\u53d6\u5f97\u3055\u308c\u308b\u306f\u305a\u3067\u3042\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"
R \u306esample()\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001\u7f6e\u63db\u306e\u6709\u7121\u306b\u304b\u304b\u308f\u3089\u305a\u3001\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u307e\u305f\u306f\u30d9\u30af\u30c8\u30eb\u304b\u3089\u8981\u7d20\u306e\u30e9\u30f3\u30c0\u30e0\u306a\u30b5\u30f3\u30d7\u30eb\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002 sample() \u95a2\u6570\u306e\u57fa\u672c\u69cb\u6587\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002 \u30b5\u30f3\u30d7\u30eb (x\u3001\u30b5\u30a4\u30ba\u3001\u7f6e\u63db = […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-464","post","type-post","status-publish","format-standard","hentry","category-16"],"yoast_head":"\nR \u306e Sample \u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30b5\u30f3\u30d7\u30eb\u3092\u751f\u6210\u3059\u308b\u65b9\u6cd5 - Statorials<\/title>\n<meta name=\"description\" content=\"R \u306esample() \u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30b5\u30f3\u30d7\u30eb\u3092\u751f\u6210\u3059\u308b\u65b9\u6cd5\u306b\u95a2\u3059\u308b\u7c21\u5358\u306a\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/ja\/r\u306esample\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30b5\u30f3\u30d5\u309a\u30eb\u3092\u751f\u6210\u3059\u308b\u65b9\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"R \u306e Sample \u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30b5\u30f3\u30d7\u30eb\u3092\u751f\u6210\u3059\u308b\u65b9\u6cd5 - Statorials\" \/>\n<meta property=\"og:description\" content=\"R \u306esample() \u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30b5\u30f3\u30d7\u30eb\u3092\u751f\u6210\u3059\u308b\u65b9\u6cd5\u306b\u95a2\u3059\u308b\u7c21\u5358\u306a\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/ja\/r\u306esample\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30b5\u30f3\u30d5\u309a\u30eb\u3092\u751f\u6210\u3059\u308b\u65b9\u6cd5\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-29T19:49:15+00:00\" \/>\n<meta name=\"author\" content=\"\u30d9\u30f3\u30b8\u30e3\u30df\u30f3\u30fb\u30a2\u30f3\u30c0\u30fc\u30bd\u30f3\u535a\u58eb\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u30d9\u30f3\u30b8\u30e3\u30df\u30f3\u30fb\u30a2\u30f3\u30c0\u30fc\u30bd\u30f3\u535a\u58eb\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/ja\/r%e3%81%aesample%e9%96%a2%e6%95%b0%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%a6%e3%82%b5%e3%83%b3%e3%83%95%e3%82%9a%e3%83%ab%e3%82%92%e7%94%9f%e6%88%90%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/\",\"url\":\"https:\/\/statorials.org\/ja\/r%e3%81%aesample%e9%96%a2%e6%95%b0%e3%82%92%e4%bd%bf%e7%94%a8%e3%81%97%e3%81%a6%e3%82%b5%e3%83%b3%e3%83%95%e3%82%9a%e3%83%ab%e3%82%92%e7%94%9f%e6%88%90%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/\",\"name\":\"R \u306e Sample \u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30b5\u30f3\u30d7\u30eb\u3092\u751f\u6210\u3059\u308b\u65b9\u6cd5 - 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