{"id":3287,"date":"2023-07-18T07:10:31","date_gmt":"2023-07-18T07:10:31","guid":{"rendered":"https:\/\/statorials.org\/cn\/r-%e4%b8%8b%e6%a0%87%e8%b5%8b%e5%80%bc%e4%b8%ad%e4%b8%8d%e5%85%81%e8%ae%b8%e7%bc%ba%e5%a4%b1%e5%80%bc\/"},"modified":"2023-07-18T07:10:31","modified_gmt":"2023-07-18T07:10:31","slug":"r-%e4%b8%8b%e6%a0%87%e8%b5%8b%e5%80%bc%e4%b8%ad%e4%b8%8d%e5%85%81%e8%ae%b8%e7%bc%ba%e5%a4%b1%e5%80%bc","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/r-%e4%b8%8b%e6%a0%87%e8%b5%8b%e5%80%bc%e4%b8%ad%e4%b8%8d%e5%85%81%e8%ae%b8%e7%bc%ba%e5%a4%b1%e5%80%bc\/","title":{"rendered":"\u5982\u4f55\u5728 r \u4e2d\u4fee\u590d\uff1a\u4e0b\u6807\u8d4b\u503c\u4e2d\u4e0d\u5141\u8bb8\u7f3a\u5931\u503c"},"content":{"rendered":"

<\/p>\n

\n

\u4f7f\u7528 R \u65f6\u53ef\u80fd\u9047\u5230\u7684\u9519\u8bef\u6d88\u606f\u662f\uff1a<\/span><\/p>\n

 Error in `[<-.data.frame`(`*tmp*`, df$A == 5, , value = list(A = c(NA, : \n  missing values are not allowed in subscripted assignments of data frames\n<\/strong><\/pre>\n
\u5f53\u60a8\u5c1d\u8bd5\u4f7f\u7528\u53e6\u4e00\u5217\u4e2d\u7684\u503c\u5206\u914d\u4e00\u5217\u4e2d\u7684\u503c\uff0c\u4f46\u5b58\u5728NA<\/strong>\u503c\u65f6\uff0c\u901a\u5e38\u4f1a\u53d1\u751f\u6b64\u9519\u8bef\u3002<\/span><\/p>\n
\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5728\u5b9e\u8df5\u4e2d\u89e3\u51b3\u6b64\u9519\u8bef\u3002<\/span><\/p>\n
\u5982\u4f55\u91cd\u73b0\u9519\u8bef<\/strong><\/span><\/h2>\n
\u5047\u8bbe\u6211\u4eec\u5728 R \u4e2d\u521b\u5efa\u4ee5\u4e0b\u6570\u636e\u6846\uff1a<\/span><\/p>\n
 #create data frame\n<\/span>df <- data. frame<\/span> (A=c(3, 4, 4, NA, 5, 8, 5, 9),\n                 B=c(12, 13, 7, 7, 12, 11, 15, 7))\n\n#view data frame\n<\/span>df\n\n   AB\n1 3 12\n2 4 13\n3 4 7\n4 NA 7\n5 5 12\n6 8 11\n7 5 15\n8 9 7\n<\/span><\/span><\/strong><\/pre>\n
\u73b0\u5728\u5047\u8bbe\u6211\u4eec\u5c1d\u8bd5\u4e3a B \u5217\u4e2d\u7684\u6bcf\u4e00\u884c\u5206\u914d\u503c 10\uff0c\u5176\u4e2d A \u5217\u4e2d\u7684\u5bf9\u5e94\u503c\u4e3a 5\uff1a<\/span><\/p>\n
 #attempt to assign column B a value of 10 where A is equal to 5\n<\/span>df[df$A == 5, ]$B <- 10\n\nError in `[<-.data.frame`(`*tmp*`, df$A == 5, , value = list(A = c(NA, : \n  missing values are not allowed in subscripted assignments of data frames\n<\/span><\/span><\/strong><\/pre>\n
\u6211\u4eec\u6536\u5230\u4e00\u4e2a\u9519\u8bef\uff0c\u56e0\u4e3a A \u5217\u4e2d\u6709 NA \u503c\uff0c\u5e76\u4e14\u9519\u8bef\u6d88\u606f\u660e\u786e\u544a\u8bc9\u6211\u4eec\u6570\u636e\u6846\u7684\u4e0b\u6807\u8d4b\u503c\u4e2d\u4e0d\u5141\u8bb8\u7f3a\u5931\u503c<\/strong>\u3002<\/span><\/p>\n
\u5982\u4f55\u907f\u514d\u9519\u8bef<\/strong><\/span><\/h2>\n
\u6709\u4e24\u79cd\u65b9\u6cd5\u53ef\u4ee5\u907f\u514d\u6b64\u9519\u8bef\u3002<\/span><\/p>\n
 1.\u4f7f\u7528%in%\u8fd0\u7b97\u7b26<\/strong><\/span><\/p>\n
\u907f\u514d\u6b64\u9519\u8bef\u7684\u4e00\u79cd\u65b9\u6cd5\u662f\u5728\u6267\u884c\u8d4b\u503c\u65f6\u4f7f\u7528%in%<\/a>\u8fd0\u7b97\u7b26\uff1a<\/span><\/span><\/p>\n
 #assign column B a value of 10 where A is equal to 5\n<\/span>df[df$A %in%<\/span> 5,]$B <- 10\n\n#view updated data frame\n<\/span>df\n\n   AB\n1 3 12\n2 4 13\n3 4 7\n4 NA 7\n5 5 10\n6 8 11\n7 5 10\n8 9 7\n<\/strong><\/pre>\n
\u8bf7\u6ce8\u610f\uff0c\u503c 10 \u5df2\u5206\u914d\u7ed9 B \u5217\u4e2d\u7684\u6bcf\u4e00\u884c\uff0c\u5176\u4e2d A \u5217\u4e2d\u7684\u5bf9\u5e94\u503c\u662f 5\uff0c\u5e76\u4e14\u6211\u4eec\u6ca1\u6709\u6536\u5230\u4efb\u4f55\u9519\u8bef\u3002<\/span><\/p>\n
 2.\u4f7f\u7528is.na()<\/strong><\/span><\/p>\n
 #assign column B a value of 10 where A is equal to 5\n<\/span>df[!is. na<\/span> (df$A) & df$A == 5, ]$B <- 10\n\n#view updated data frame\n<\/span>df\n\n   AB\n1 3 12\n2 4 13\n3 4 7\n4 NA 7\n5 5 10\n6 8 11\n7 5 10\n8 9 7<\/span>\n<\/span><\/strong><\/pre>\n
\u540c\u6837\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u503c 10 \u5206\u914d\u7ed9 B \u5217\u4e2d\u7684\u6bcf\u4e00\u884c\uff0c\u5176\u4e2d A \u5217\u4e2d\u7684\u76f8\u5e94\u503c\u4e3a 5\uff0c\u5e76\u4e14\u6211\u4eec\u4e0d\u4f1a\u6536\u5230\u4efb\u4f55\u9519\u8bef\u3002<\/span><\/p>\n
\u5176\u4ed6\u8d44\u6e90<\/strong><\/span><\/h2>\n
\u4ee5\u4e0b\u6559\u7a0b\u89e3\u91ca\u4e86\u5982\u4f55\u4fee\u590d R \u4e2d\u7684\u5176\u4ed6\u5e38\u89c1\u9519\u8bef\uff1a<\/span><\/p>\n
 \u5982\u4f55\u5728 R \u4e2d\u4fee\u590d\uff1a\u53c2\u6570\u6d89\u53ca\u4e0d\u540c\u7684\u884c\u6570<\/a>
\u5982\u4f55\u4fee\u590d R\uff1a\u9009\u62e9\u672a\u4f7f\u7528\u7684\u53c2\u6570\u65f6\u51fa\u9519<\/a>
\u5982\u4f55\u5728 R \u4e2d\u4fee\u590d\uff1a\u66ff\u6362\u957f\u5ea6\u4e3a\u96f6<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u4f7f\u7528 R \u65f6\u53ef\u80fd\u9047\u5230\u7684\u9519\u8bef\u6d88\u606f\u662f\uff1a Error in `[<-.data.frame`(`*tmp*`, […]<\/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-3287","post","type-post","status-publish","format-standard","hentry","category-11"],"yoast_head":"\n\u5982\u4f55\u5728 R \u4e2d\u4fee\u590d\uff1a\u4e0b\u6807\u8d4b\u503c\u4e2d\u4e0d\u5141\u8bb8\u7f3a\u5931\u503c - Statorials<\/title>\n<meta name=\"description\" content=\"\u672c\u6559\u7a0b\u89e3\u91ca\u4e86\u5982\u4f55\u4fee\u590d R \u4e2d\u7684\u4ee5\u4e0b\u9519\u8bef\uff1a\u6570\u636e\u6846\u7684\u4e0b\u6807\u5206\u914d\u4e2d\u4e0d\u5141\u8bb8\u7f3a\u5c11\u503c\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\/cn\/r-\u4e0b\u6807\u8d4b\u503c\u4e2d\u4e0d\u5141\u8bb8\u7f3a\u5931\u503c\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5982\u4f55\u5728 R \u4e2d\u4fee\u590d\uff1a\u4e0b\u6807\u8d4b\u503c\u4e2d\u4e0d\u5141\u8bb8\u7f3a\u5931\u503c - 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