{"id":2084,"date":"2023-07-23T18:54:13","date_gmt":"2023-07-23T18:54:13","guid":{"rendered":"https:\/\/statorials.org\/cn\/r-%e5%90%88%e5%b9%b6%e5%a4%9a%e5%88%97\/"},"modified":"2023-07-23T18:54:13","modified_gmt":"2023-07-23T18:54:13","slug":"r-%e5%90%88%e5%b9%b6%e5%a4%9a%e5%88%97","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/r-%e5%90%88%e5%b9%b6%e5%a4%9a%e5%88%97\/","title":{"rendered":"A\uff1a\u5982\u4f55\u57fa\u4e8e\u591a\u5217\u5408\u5e76\u6570\u636e\u6846"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u57fa\u672c\u8bed\u6cd5\u5728 R \u4e2d\u57fa\u4e8e\u591a\u5217\u5408\u5e76\u4e24\u4e2a\u6570\u636e\u6846\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>merge(df1, df2, by. <span style=\"color: #3366ff;\">x<\/span> =c(' <span style=\"color: #ff0000;\">col1<\/span> ', ' <span style=\"color: #ff0000;\">col2<\/span> '), by. <span style=\"color: #3366ff;\">y<\/span> =c(' <span style=\"color: #ff0000;\">col1<\/span> ', ' <span style=\"color: #ff0000;\">col2<\/span> '))\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5728\u5b9e\u8df5\u4e2d\u4f7f\u7528\u6b64\u8bed\u6cd5\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u793a\u4f8b\uff1a\u8de8\u591a\u5217\u5408\u5e76\u6570\u636e\u5757<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u5047\u8bbe\u6211\u4eec\u5728 R \u4e2d\u6709\u4ee5\u4e0b\u4e24\u4e2a\u6570\u636e\u6846\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#define data frames<\/span>\ndf1 = data. <span style=\"color: #3366ff;\">frame<\/span> (playerID=c(1, 2, 3, 4, 5, 6),\n                 team=c('A', 'B', 'B', 'B', 'C', 'C'),\n                 dots=c(19, 22, 25, 29, 34, 39))\n\ndf2 = data. <span style=\"color: #3366ff;\">frame<\/span> (playerID=c(1, 2, 3, 4),\n                 tm=c('A', 'B', 'B', 'B'),\n                 rebounds=c(7, 8, 8, 14))\n\n<span style=\"color: #008080;\">#view first data frame<\/span>\ndf1\n\n  playerID team points\n1 1 A 19\n2 2 B 22\n3 3 B 25\n4 4 B 29\n5 5 C 34\n6 6 C 39\n\n<span style=\"color: #008080;\">#view second data frame\n<\/span>df2 \n\n  playerID tm rebounds\n1 1 To 7\n2 2 B 8\n3 3 B 8\n4 4 B 14<\/strong><\/span><\/pre>\n<p><span style=\"color: #000000;\">\u8bf7\u6ce8\u610f\uff0c\u4e24\u4e2a\u6570\u636e\u6846\u5171\u4eab<strong>playerID<\/strong>\u5217\uff0c\u4f46\u56e2\u961f\u5217\u5728\u6bcf\u4e2a\u6570\u636e\u6846\u4e2d\u5177\u6709\u4e0d\u540c\u7684\u540d\u79f0\uff1a<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\">\u7b2c\u4e00\u4e2a\u6570\u636e\u6846\u6709\u201c<strong>\u56e2\u961f<\/strong>\u201d\u5217<\/span><\/li>\n<li><span style=\"color: #000000;\">\u7b2c\u4e8c\u4e2a\u6570\u636e\u6846\u6709\u5217\u201c <strong>tm<\/strong> \u201d<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u4e3a\u4e86\u6839\u636eplayerID\u548cteam\u5217\u5408\u5e76\u8fd9\u4e9b\u6570\u636e\u6846\uff0c\u6211\u4eec\u9700\u8981\u4f7f\u7528<strong>by.x<\/strong>\u548c<strong>by.y<\/strong>\u53c2\u6570\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\u6765\u6267\u884c\u6b64\u5408\u5e76\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#merge two data frames<\/span>\n<span style=\"color: #000000;\">merged = merge(df1, df2, by. <span style=\"color: #3366ff;\">x<\/span> =c(' <span style=\"color: #ff0000;\">playerID<\/span> ', ' <span style=\"color: #ff0000;\">team<\/span> '), by. <span style=\"color: #3366ff;\">y<\/span> =c(' <span style=\"color: #ff0000;\">playerID<\/span> ', ' <span style=\"color: #ff0000;\">tm<\/span> '))\n\n<span style=\"color: #008080;\">#view merged data frame\n<\/span>merged\n\n  playerID team points rebounds\n1 1 A 19 7\n2 2 B 22 8\n3 3 B 25 8\n4 4 B 29 14<\/span>\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u6700\u7ec8\u5408\u5e76\u7684\u6570\u636e\u5e27\u5305\u542b\u5c5e\u4e8e\u539f\u59cb\u4e24\u4e2a\u6570\u636e\u5e27\u7684\u6240\u6709\u56db\u4e2a\u73a9\u5bb6\u7684\u6570\u636e\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u5176\u4ed6\u8d44\u6e90<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u6559\u7a0b\u89e3\u91ca\u4e86\u5982\u4f55\u5728 R \u4e2d\u6267\u884c\u5176\u4ed6\u5e38\u89c1\u6570\u636e\u6846\u51fd\u6570\uff1a<\/span><\/p>\n<p><a href=\"https:\/\/statorials.org\/cn\/\u5de6\u8fde\u63a5-r\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728 R \u4e2d\u8fdb\u884c\u5de6\u8fde\u63a5<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/r-\u4e2d\u7684-vlookup\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728 R \u4e2d\u8fdb\u884c VLOOKUP<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/r-\u6dfb\u52a0\u5230\u6570\u636e\u6846\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728R\u4e2d\u5411\u6570\u636e\u6846\u6dfb\u52a0\u884c<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u57fa\u672c\u8bed\u6cd5\u5728 R \u4e2d\u57fa\u4e8e\u591a\u5217\u5408\u5e76\u4e24\u4e2a\u6570\u636e\u6846\uff1a merge(df1, df2, by. x =c(&#8216; [&hellip;]<\/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-2084","post","type-post","status-publish","format-standard","hentry","category-11"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A\uff1a\u5982\u4f55\u57fa\u4e8e\u591a\u5217\u5408\u5e76\u6570\u636e\u6846 - Statorials<\/title>\n<meta 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