{"id":947,"date":"2023-07-28T05:30:58","date_gmt":"2023-07-28T05:30:58","guid":{"rendered":"https:\/\/statorials.org\/th\/%e0%b9%80%e0%b8%82%e0%b9%89%e0%b8%b2%e0%b8%a3%e0%b9%88%e0%b8%a7%e0%b8%a1%e0%b8%ab%e0%b8%a5%e0%b8%b2%e0%b8%a2-dplyr-dataframes\/"},"modified":"2023-07-28T05:30:58","modified_gmt":"2023-07-28T05:30:58","slug":"%e0%b9%80%e0%b8%82%e0%b9%89%e0%b8%b2%e0%b8%a3%e0%b9%88%e0%b8%a7%e0%b8%a1%e0%b8%ab%e0%b8%a5%e0%b8%b2%e0%b8%a2-dplyr-dataframes","status":"publish","type":"post","link":"https:\/\/statorials.org\/th\/%e0%b9%80%e0%b8%82%e0%b9%89%e0%b8%b2%e0%b8%a3%e0%b9%88%e0%b8%a7%e0%b8%a1%e0%b8%ab%e0%b8%a5%e0%b8%b2%e0%b8%a2-dplyr-dataframes\/","title":{"rendered":"\u0e27\u0e34\u0e18\u0e35\u0e23\u0e27\u0e21\u0e2b\u0e25\u0e32\u0e22\u0e40\u0e1f\u0e23\u0e21\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e42\u0e14\u0e22\u0e43\u0e0a\u0e49 dplyr"},"content":{"rendered":"

<\/p>\n

\n

\u0e1a\u0e48\u0e2d\u0e22\u0e04\u0e23\u0e31\u0e49\u0e07\u0e17\u0e35\u0e48\u0e04\u0e38\u0e13\u0e2d\u0e32\u0e08\u0e2a\u0e19\u0e43\u0e08\u0e17\u0e35\u0e48\u0e08\u0e30\u0e40\u0e02\u0e49\u0e32\u0e23\u0e48\u0e27\u0e21\u0e2b\u0e25\u0e32\u0e22\u0e40\u0e1f\u0e23\u0e21\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e43\u0e19 R \u0e42\u0e0a\u0e04\u0e14\u0e35\u0e17\u0e35\u0e48\u0e17\u0e33\u0e44\u0e14\u0e49\u0e07\u0e48\u0e32\u0e22\u0e42\u0e14\u0e22\u0e43\u0e0a\u0e49\u0e1f\u0e31\u0e07\u0e01\u0e4c\u0e0a\u0e31\u0e19 left_join()<\/a><\/span> \u0e08\u0e32\u0e01\u0e41\u0e1e\u0e47\u0e04\u0e40\u0e01\u0e08 dplyr<\/a><\/span><\/p>\n

 library(dplyr)<\/strong><\/pre>\n
 \u0e15\u0e31\u0e27\u0e2d\u0e22\u0e48\u0e32\u0e07\u0e40\u0e0a\u0e48\u0e19 \u0e2a\u0e21\u0e21\u0e15\u0e34\u0e27\u0e48\u0e32\u0e40\u0e23\u0e32\u0e21\u0e35\u0e01\u0e23\u0e2d\u0e1a\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e2a\u0e32\u0e21\u0e01\u0e23\u0e2d\u0e1a\u0e15\u0e48\u0e2d\u0e44\u0e1b\u0e19\u0e35\u0e49:<\/span><\/p>\n
 #create data frame<\/span>\ndf1 <- data.frame(a = c('a', 'b', 'c', 'd', 'e', 'f'),\n                  b = c(12, 14, 14, 18, 22, 23))\n\ndf2 <- data.frame(a = c('a', 'a', 'a', 'b', 'b', 'b'),\n                  c = c(23, 24, 33, 34, 37, 41))\n\ndf3 <- data.frame(a = c('d', 'e', 'f', 'g', 'h', 'i'),\n                  d = c(23, 24, 33, 34, 37, 41))\n<\/strong><\/pre>\n
 \u0e2b\u0e32\u0e01\u0e15\u0e49\u0e2d\u0e07\u0e01\u0e32\u0e23\u0e23\u0e27\u0e21\u0e40\u0e1f\u0e23\u0e21\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e17\u0e31\u0e49\u0e07\u0e2a\u0e32\u0e21\u0e40\u0e02\u0e49\u0e32\u0e14\u0e49\u0e27\u0e22\u0e01\u0e31\u0e19 \u0e40\u0e23\u0e32\u0e2a\u0e32\u0e21\u0e32\u0e23\u0e16\u0e17\u0e33\u0e01\u0e32\u0e23\u0e23\u0e27\u0e21\u0e2a\u0e2d\u0e07\u0e40\u0e1f\u0e23\u0e21\u0e14\u0e49\u0e32\u0e19\u0e0b\u0e49\u0e32\u0e22 \u0e17\u0e35\u0e25\u0e30\u0e40\u0e1f\u0e23\u0e21:<\/span><\/p>\n
 #join the three data frames<\/span>\ndf1 %>%\n    left_join<\/span> (df2, by='a') %>%\n    left_join<\/span> (df3, by='a')\n\n   abcd\n1 to 12 23 NA\n2 to 12 24 NA\n3 to 12 33 NA\n4 b 14 34 NA\n5 b 14 37 NA\n6 b 14 41 NA\n7 c 14 NA NA\n8 d 18 NA 23\n9th 22 NA 24\n10 f 23 NA 33\n<\/strong><\/pre>\n
 \u0e42\u0e1b\u0e23\u0e14\u0e17\u0e23\u0e32\u0e1a\u0e27\u0e48\u0e32\u0e04\u0e38\u0e13\u0e22\u0e31\u0e07\u0e2a\u0e32\u0e21\u0e32\u0e23\u0e16\u0e1a\u0e31\u0e19\u0e17\u0e36\u0e01\u0e1c\u0e25\u0e25\u0e31\u0e1e\u0e18\u0e4c\u0e02\u0e2d\u0e07\u0e01\u0e32\u0e23\u0e40\u0e02\u0e49\u0e32\u0e23\u0e48\u0e27\u0e21\u0e19\u0e35\u0e49\u0e40\u0e1b\u0e47\u0e19\u0e01\u0e23\u0e2d\u0e1a\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e44\u0e14\u0e49:<\/span><\/p>\n
 #join the three data frames and save result as new data frame named all_data<\/span>\nall_data <- df1 %>%\n              left_join<\/span> (df2, by='a') %>%\n              left_join<\/span> (df3, by='a')\n\n#view summary of resulting data frame\n<\/span>glimpse(all_data)\n\nComments: 10\nVariables: 4\n$ a <chr> \"a\", \"a\", \"a\", \"b\", \"b\", \"b\", \"c\", \"d\", \"e\", \"f\"\n$b<dbl> 12, 12, 12, 14, 14, 14, 14, 18, 22, 23\n$ c <dbl> 23, 24, 33, 34, 37, 41, NA, NA, NA, NA\n$ d <dbl> NA, NA, NA, NA, NA, NA, NA, 23, 24, 33\n<\/strong><\/pre>\n
 \u0e41\u0e2b\u0e25\u0e48\u0e07\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e40\u0e1e\u0e34\u0e48\u0e21\u0e40\u0e15\u0e34\u0e21<\/strong><\/span><\/h3>\n
 \u0e27\u0e34\u0e18\u0e35\u0e01\u0e23\u0e2d\u0e07\u0e41\u0e16\u0e27\u0e43\u0e19 R<\/a>
 \u0e27\u0e34\u0e18\u0e35\u0e25\u0e1a\u0e1a\u0e23\u0e23\u0e17\u0e31\u0e14\u0e17\u0e35\u0e48\u0e0b\u0e49\u0e33\u0e01\u0e31\u0e19\u0e43\u0e19 R<\/a>
 \u0e27\u0e34\u0e18\u0e35\u0e08\u0e31\u0e14\u0e01\u0e25\u0e38\u0e48\u0e21\u0e41\u0e25\u0e30\u0e2a\u0e23\u0e38\u0e1b\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e43\u0e19 R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u0e1a\u0e48\u0e2d\u0e22\u0e04\u0e23\u0e31\u0e49\u0e07\u0e17\u0e35\u0e48\u0e04\u0e38\u0e13\u0e2d\u0e32\u0e08\u0e2a\u0e19\u0e43\u0e08\u0e17\u0e35\u0e48\u0e08\u0e30\u0e40\u0e02\u0e49\u0e32\u0e23\u0e48\u0e27\u0e21\u0e2b\u0e25\u0e32\u0e22\u0e40\u0e1f\u0e23\u0e21\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e43\u0e19 R \u0e42 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-947","post","type-post","status-publish","format-standard","hentry","category-3"],"yoast_head":"\n\u0e27\u0e34\u0e18\u0e35\u0e23\u0e27\u0e21\u0e2b\u0e25\u0e32\u0e22\u0e40\u0e1f\u0e23\u0e21\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e42\u0e14\u0e22\u0e43\u0e0a\u0e49 dplyr - Statorials<\/title>\n<meta name=\"description\" content=\"\u0e04\u0e33\u0e2d\u0e18\u0e34\u0e1a\u0e32\u0e22\u0e07\u0e48\u0e32\u0e22\u0e46 \u0e40\u0e01\u0e35\u0e48\u0e22\u0e27\u0e01\u0e31\u0e1a\u0e27\u0e34\u0e18\u0e35\u0e23\u0e27\u0e21\u0e2b\u0e25\u0e32\u0e22\u0e40\u0e1f\u0e23\u0e21\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e43\u0e19 R \u0e42\u0e14\u0e22\u0e43\u0e0a\u0e49 dplyr\" \/>\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\/th\/\u0e40\u0e02\u0e49\u0e32\u0e23\u0e48\u0e27\u0e21\u0e2b\u0e25\u0e32\u0e22-dplyr-dataframes\/\" \/>\n<meta property=\"og:locale\" content=\"th_TH\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0e27\u0e34\u0e18\u0e35\u0e23\u0e27\u0e21\u0e2b\u0e25\u0e32\u0e22\u0e40\u0e1f\u0e23\u0e21\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e42\u0e14\u0e22\u0e43\u0e0a\u0e49 dplyr - Statorials\" \/>\n<meta property=\"og:description\" content=\"\u0e04\u0e33\u0e2d\u0e18\u0e34\u0e1a\u0e32\u0e22\u0e07\u0e48\u0e32\u0e22\u0e46 \u0e40\u0e01\u0e35\u0e48\u0e22\u0e27\u0e01\u0e31\u0e1a\u0e27\u0e34\u0e18\u0e35\u0e23\u0e27\u0e21\u0e2b\u0e25\u0e32\u0e22\u0e40\u0e1f\u0e23\u0e21\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e43\u0e19 R \u0e42\u0e14\u0e22\u0e43\u0e0a\u0e49 dplyr\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/th\/\u0e40\u0e02\u0e49\u0e32\u0e23\u0e48\u0e27\u0e21\u0e2b\u0e25\u0e32\u0e22-dplyr-dataframes\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-28T05:30:58+00:00\" \/>\n<meta name=\"author\" content=\"\u0e14\u0e23.\u0e40\u0e1a\u0e19\u0e08\u0e32\u0e21\u0e34\u0e19 \u0e41\u0e2d\u0e19\u0e40\u0e14\u0e2d\u0e23\u0e4c\u0e2a\u0e31\u0e19\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u0e14\u0e23.\u0e40\u0e1a\u0e19\u0e08\u0e32\u0e21\u0e34\u0e19 \u0e41\u0e2d\u0e19\u0e40\u0e14\u0e2d\u0e23\u0e4c\u0e2a\u0e31\u0e19\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u0e19\u0e32\u0e17\u0e35\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/th\/%e0%b9%80%e0%b8%82%e0%b9%89%e0%b8%b2%e0%b8%a3%e0%b9%88%e0%b8%a7%e0%b8%a1%e0%b8%ab%e0%b8%a5%e0%b8%b2%e0%b8%a2-dplyr-dataframes\/\",\"url\":\"https:\/\/statorials.org\/th\/%e0%b9%80%e0%b8%82%e0%b9%89%e0%b8%b2%e0%b8%a3%e0%b9%88%e0%b8%a7%e0%b8%a1%e0%b8%ab%e0%b8%a5%e0%b8%b2%e0%b8%a2-dplyr-dataframes\/\",\"name\":\"\u0e27\u0e34\u0e18\u0e35\u0e23\u0e27\u0e21\u0e2b\u0e25\u0e32\u0e22\u0e40\u0e1f\u0e23\u0e21\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e42\u0e14\u0e22\u0e43\u0e0a\u0e49 dplyr - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/th\/#website\"},\"datePublished\":\"2023-07-28T05:30:58+00:00\",\"dateModified\":\"2023-07-28T05:30:58+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/th\/#\/schema\/person\/7c9bb3d0f799d0f1b17883495e1de332\"},\"description\":\"\u0e04\u0e33\u0e2d\u0e18\u0e34\u0e1a\u0e32\u0e22\u0e07\u0e48\u0e32\u0e22\u0e46 \u0e40\u0e01\u0e35\u0e48\u0e22\u0e27\u0e01\u0e31\u0e1a\u0e27\u0e34\u0e18\u0e35\u0e23\u0e27\u0e21\u0e2b\u0e25\u0e32\u0e22\u0e40\u0e1f\u0e23\u0e21\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e43\u0e19 R \u0e42\u0e14\u0e22\u0e43\u0e0a\u0e49 dplyr\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/th\/%e0%b9%80%e0%b8%82%e0%b9%89%e0%b8%b2%e0%b8%a3%e0%b9%88%e0%b8%a7%e0%b8%a1%e0%b8%ab%e0%b8%a5%e0%b8%b2%e0%b8%a2-dplyr-dataframes\/#breadcrumb\"},\"inLanguage\":\"th\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/th\/%e0%b9%80%e0%b8%82%e0%b9%89%e0%b8%b2%e0%b8%a3%e0%b9%88%e0%b8%a7%e0%b8%a1%e0%b8%ab%e0%b8%a5%e0%b8%b2%e0%b8%a2-dplyr-dataframes\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/th\/%e0%b9%80%e0%b8%82%e0%b9%89%e0%b8%b2%e0%b8%a3%e0%b9%88%e0%b8%a7%e0%b8%a1%e0%b8%ab%e0%b8%a5%e0%b8%b2%e0%b8%a2-dplyr-dataframes\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u0e1a\u0e49\u0e32\u0e19\",\"item\":\"https:\/\/statorials.org\/th\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u0e27\u0e34\u0e18\u0e35\u0e23\u0e27\u0e21\u0e2b\u0e25\u0e32\u0e22\u0e40\u0e1f\u0e23\u0e21\u0e02\u0e49\u0e2d\u0e21\u0e39\u0e25\u0e42\u0e14\u0e22\u0e43\u0e0a\u0e49 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