{"id":2120,"date":"2023-07-23T14:55:03","date_gmt":"2023-07-23T14:55:03","guid":{"rendered":"https:\/\/statorials.org\/cn\/dplyr-%e5%88%a0%e9%99%a4%e8%a1%8c\/"},"modified":"2023-07-23T14:55:03","modified_gmt":"2023-07-23T14:55:03","slug":"dplyr-%e5%88%a0%e9%99%a4%e8%a1%8c","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/dplyr-%e5%88%a0%e9%99%a4%e8%a1%8c\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 dplyr \u5220\u9664\u884c\uff08\u5e26\u6709\u793a\u4f8b\uff09"},"content":{"rendered":"

<\/p>\n

\n

\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u57fa\u672c\u8bed\u6cd5\u4f7f\u7528 dplyr \u4ece R \u6570\u636e\u6846\u4e2d\u5220\u9664\u884c\uff1a<\/span><\/p>\n

1.\u5220\u9664\u4efb\u4f55\u5e26\u6709NA\u7684\u884c<\/strong><\/span><\/p>\n

 df %>%\n  n \/ A. omit<\/span> ()<\/strong><\/span><\/pre>\n
2.\u5220\u9664\u7279\u5b9a\u5217\u4e2d\u4efb\u4f55\u5e26\u6709NA\u7684\u884c<\/strong><\/span><\/p>\n
 df %>%<\/span><\/strong>\nfilter( !<\/span> is. na<\/span> (column_name))<\/span><\/strong><\/pre>\n
3. \u5220\u9664\u91cd\u590d\u9879<\/strong><\/span><\/p>\n
 df %>%\n  distinct()\n<\/strong><\/span><\/pre>\n
4.\u6309\u7d22\u5f15\u4f4d\u7f6e\u5220\u9664\u884c<\/strong><\/span><\/p>\n
 df %>%<\/strong><\/span>\nfilter( !<\/span> row_number() %in%<\/span> c(1, 2, 4))<\/strong><\/span><\/pre>\n
5. \u6839\u636e\u6761\u4ef6\u5220\u9664\u884c<\/strong><\/span><\/p>\n
 df %>%\n  filter(column1 ==<\/span> ' A<\/span> ' | column2 ><\/span> 8)<\/strong><\/span><\/pre>\n
\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5728\u5b9e\u8df5\u4e2d\u4f7f\u7528\u4ee5\u4e0b\u6570\u636e\u6846\u4f7f\u7528\u6bcf\u79cd\u65b9\u6cd5\uff1a<\/span><\/p>\n
 library<\/span> (dplyr)<\/span>\n\n#create data frame\n<\/span>df <- data. frame<\/span> (team=c('A', 'A', 'B', 'B', 'C', 'C'),\n                 points=c(4, NA, 7, 5, 9, 9),\n                 assists=c(1, 3, 5, NA, 2, 2))\n\n#view data frame\n<\/span>df\n\n  team points assists\n1 to 4 1\n2 A NA 3\n3 B 7 5\n4 B 5 NA\n5 C 9 2\n6 C 9 2\n<\/strong><\/span><\/pre>\n
\u793a\u4f8b 1\uff1a\u5220\u9664\u4efb\u4f55\u5e26\u6709 NA \u7684\u884c<\/strong><\/span><\/h3>\n
\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u4ece\u6570\u636e\u6846\u4e2d\u5220\u9664\u4efb\u4f55\u5305\u542b NA \u503c\u7684\u884c\uff1a<\/span><\/p>\n
 #remove any row with NA<\/span>\ndf %>%\n  n \/ A. omit<\/span> ()\n\n  team points assists\n1 to 4 1\n3 B 7 5\n5 C 9 2\n6 C 9 2<\/strong><\/pre>\n
\u793a\u4f8b 2\uff1a\u5220\u9664\u7279\u5b9a\u5217\u4e2d\u4efb\u4f55\u5e26\u6709 NA \u7684\u884c<\/strong><\/span><\/h3>\n
\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u5220\u9664\u7279\u5b9a\u5217\u4e2d\u5305\u542b NA \u503c\u7684\u4efb\u4f55\u884c\uff1a<\/span><\/p>\n
 #remove any row with NA in 'points' column:<\/span>\ndf %>%\n  filter( !<\/span> is. na<\/span> (dots))\n\n  team points assists\n1 to 4 1\n2 B 7 5\n3 B 5 NA\n4 C 9 2\n5 C 9 2<\/strong><\/pre>\n
\u793a\u4f8b 3\uff1a\u5220\u9664\u91cd\u590d\u884c<\/strong><\/span><\/h3>\n
\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u5220\u9664\u91cd\u590d\u884c\uff1a<\/span><\/p>\n
 #remove duplicate rows<\/span>\ndf %>%\n  distinct()\n\n  team points assists\n1 to 4 1\n2 A NA 3\n3 B 7 5\n4 B 5 NA\n5 C 9 2<\/strong><\/pre>\n
\u793a\u4f8b 4\uff1a\u6309\u7d22\u5f15\u4f4d\u7f6e\u5220\u9664\u884c<\/strong><\/span><\/h3>\n
\u4ee5\u4e0b\u4ee3\u7801\u663e\u793a\u4e86\u5982\u4f55\u6839\u636e\u7d22\u5f15\u4f4d\u7f6e\u5220\u9664\u884c\uff1a<\/span><\/p>\n
 #remove rows 1, 2, and 4<\/span>\ndf %>%\n<\/span>filter( !<\/span> row_number() %in%<\/span> c(1, 2, 4))<\/span>\n\n  team points assists\n1 B 7 5\n2 C 9 2\n3 C 9 2<\/strong><\/pre>\n
\u793a\u4f8b 5\uff1a\u6839\u636e\u6761\u4ef6\u5220\u9664\u884c<\/strong><\/span><\/h3>\n
\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u6839\u636e\u7279\u5b9a\u6761\u4ef6\u5220\u9664\u884c\uff1a<\/span><\/p>\n
 #only keep rows where team is equal to 'A' or points is greater than 8<\/span>\ndf %>%\n  filter(column1 ==<\/span> ' A<\/span> ' | column2 ><\/span> 8)<\/span>\n\n  team points assists\n1 to 4 1\n2 A NA 3\n3 C 9 2\n4 C 9 2<\/strong><\/pre>\n
\u5176\u4ed6\u8d44\u6e90<\/strong><\/span><\/h3>\n
\u4ee5\u4e0b\u6559\u7a0b\u89e3\u91ca\u4e86\u5982\u4f55\u5728 dplyr \u4e2d\u6267\u884c\u5176\u4ed6\u5e38\u7528\u529f\u80fd\uff1a<\/span><\/p>\n
\u5982\u4f55\u4f7f\u7528 dplyr \u6309\u7d22\u5f15\u9009\u62e9\u5217<\/a>
\u5982\u4f55\u4f7f\u7528 dplyr \u6309\u7ec4\u5bf9\u53d8\u91cf\u8fdb\u884c\u6392\u5e8f<\/a>
\u5982\u4f55\u5728 dplyr \u4e2d\u7528\u96f6\u66ff\u6362 NA<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u57fa\u672c\u8bed\u6cd5\u4f7f\u7528 dplyr \u4ece R \u6570\u636e\u6846\u4e2d\u5220\u9664\u884c\uff1a 1.\u5220\u9664\u4efb\u4f55\u5e26\u6709NA\u7684\u884c df %>% […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-2120","post","type-post","status-publish","format-standard","hentry","category-11"],"yoast_head":"\n\u5982\u4f55\u4f7f\u7528 dplyr \u5220\u9664\u884c\uff08\u5e26\u6709\u793a\u4f8b\uff09 \u2013 Statorials<\/title>\n<meta name=\"description\" content=\"\u672c\u6559\u7a0b\u901a\u8fc7\u51e0\u4e2a\u793a\u4f8b\u89e3\u91ca\u4e86\u5982\u4f55\u4f7f\u7528 dplyr \u4ece R \u4e2d\u7684\u6570\u636e\u6846\u4e2d\u5220\u9664\u884c\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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