{"id":4266,"date":"2023-07-12T10:28:37","date_gmt":"2023-07-12T10:28:37","guid":{"rendered":"https:\/\/statorials.org\/cn\/dplyr-%e6%94%b9%e5%8f%98%e5%a4%9a%e4%b8%aa%e6%9d%a1%e4%bb%b6\/"},"modified":"2023-07-12T10:28:37","modified_gmt":"2023-07-12T10:28:37","slug":"dplyr-%e6%94%b9%e5%8f%98%e5%a4%9a%e4%b8%aa%e6%9d%a1%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/dplyr-%e6%94%b9%e5%8f%98%e5%a4%9a%e4%b8%aa%e6%9d%a1%e4%bb%b6\/","title":{"rendered":"Dplyr\uff1a\u5982\u4f55\u5728\u591a\u4e2a\u6761\u4ef6\u4e0b\u4f7f\u7528 mutate()"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u60a8\u53ef\u4ee5\u5728<a href=\"https:\/\/dplyr.tidyverse.org\/\" target=\"_blank\" rel=\"noopener\">dplyr<\/a>\u4e2d\u4f7f\u7528\u4ee5\u4e0b\u57fa\u672c\u8bed\u6cd5\u6765\u4f7f\u7528<strong>mutate()<\/strong>\u51fd\u6570\u6839\u636e\u591a\u4e2a\u6761\u4ef6\u521b\u5efa\u65b0\u5217\uff1a<br \/><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">library<\/span> (dplyr)\n\ndf &lt;- df%&gt;% mutate(class = case_when((team == ' <span style=\"color: #ff0000;\">A<\/span> ' <span style=\"color: #800080;\">&amp;<\/span> points &gt;= 20) ~ ' <span style=\"color: #ff0000;\">A_Good<\/span> ',\n                                     (team == ' <span style=\"color: #ff0000;\">A<\/span> ' <span style=\"color: #800080;\">&amp;<\/span> points &lt; 20) ~ ' <span style=\"color: #ff0000;\">A_Bad<\/span> ',\n                                     (team == ' <span style=\"color: #ff0000;\">B<\/span> ' <span style=\"color: #800080;\">&amp;<\/span> points &gt;= 20) ~ ' <span style=\"color: #ff0000;\">B_Good<\/span> ',\n                                      <span style=\"color: #008000;\">TRUE<\/span> ~ ' <span style=\"color: #ff0000;\">B_Bad<\/span> '))\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u8fd9\u79cd\u7279\u6b8a\u7684\u8bed\u6cd5\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a<strong>class<\/strong>\u7684\u65b0\u5217\uff0c\u5b83\u91c7\u7528\u4ee5\u4e0b\u503c\uff1a<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\">\u5982\u679c\u7403\u961f\u7b49\u4e8e A \u5e76\u4e14\u5206\u6570\u5927\u4e8e\u6216\u7b49\u4e8e 20\uff0c<strong>\u5219 A_Good<\/strong> \u3002<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>A_Bad<\/strong>\u5982\u679c\u7403\u961f\u7b49\u4e8e A \u5e76\u4e14\u5206\u6570\u5c0f\u4e8e 20\u3002<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>B_Good<\/strong>\u5982\u679c\u7403\u961f\u7b49\u4e8e B \u5e76\u4e14\u5206\u6570\u5927\u4e8e\u6216\u7b49\u4e8e 20\u3002<\/span><\/li>\n<li><span style=\"color: #000000;\">\u5982\u679c\u524d\u9762\u7684\u6761\u4ef6\u90fd\u4e0d\u6ee1\u8db3\uff0c\u5219<strong>B_Bad<\/strong> \u3002<\/span><\/li>\n<\/ul>\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<p><span style=\"color: #000000;\"><strong>\u76f8\u5173\uff1a<\/strong><a href=\"https:\/\/statorials.org\/cn\/dplyr-case_when\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728 dplyr \u4e2d\u4f7f\u7528 case_when()<\/a><\/span><\/p>\n<h2><span style=\"color: #000000;\"><strong>\u793a\u4f8b\uff1a\u5728 dplyr \u4e2d\u4f7f\u7528 mutate() \u5e76\u5177\u6709\u591a\u4e2a\u6761\u4ef6<\/strong><\/span><\/h2>\n<p><span style=\"color: #000000;\">\u5047\u8bbe\u6211\u4eec\u5728 R \u4e2d\u6709\u4ee5\u4e0b\u6570\u636e\u6846\uff0c\u5176\u4e2d\u5305\u542b\u6709\u5173\u5404\u79cd\u7bee\u7403\u8fd0\u52a8\u5458\u7684\u4fe1\u606f\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (team=c('A', 'A', 'A', 'A', 'A', 'B', 'B', 'B', 'B', 'B'),\n                 points=c(22, 30, 34, 19, 14, 12, 39, 15, 22, 25))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n   team points\n1 to 22\n2 to 30\n3 to 34\n4 to 19\n5 to 14\n6 B 12\n7 B 39\n8 B 15\n9 B 22\n10 B 25<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u548c<strong>mutate()<\/strong>\u51fd\u6570\u6765\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a<strong>class<\/strong>\u7684\u65b0\u5217\uff0c\u5176\u503c\u57fa\u4e8e<strong>team<\/strong>\u548c<strong>point<\/strong>\u5217\u4e2d\u7684\u503c\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">library<\/span> (dplyr)\n<span style=\"color: #008080;\">#add new column based on values in team and points columns\n<\/span>df &lt;- df%&gt;% mutate(class = case_when((team == ' <span style=\"color: #ff0000;\">A<\/span> ' <span style=\"color: #800080;\">&amp;<\/span> points &gt;= 20) ~ ' <span style=\"color: #ff0000;\">A_Good<\/span> ',\n                                     (team == ' <span style=\"color: #ff0000;\">A<\/span> ' <span style=\"color: #800080;\">&amp;<\/span> points &lt; 20) ~ ' <span style=\"color: #ff0000;\">A_Bad<\/span> ',\n                                     (team == ' <span style=\"color: #ff0000;\">B<\/span> ' <span style=\"color: #800080;\">&amp;<\/span> points &gt;= 20) ~ ' <span style=\"color: #ff0000;\">B_Good<\/span> ',\n                                      <span style=\"color: #008000;\">TRUE<\/span> ~ ' <span style=\"color: #ff0000;\">B_Bad<\/span> '))\n\n<span style=\"color: #008080;\">#view updated data frame<\/span>\ndf\n\n   team points class\n1 A 22 A_Good\n2 A 30 A_Good\n3 A 34 A_Good\n4 A 19 A_Bad\n5 A 14 A_Bad\n6 B 12 B_Bad\n7 B 39 B_Good\n8 B 15 B_Bad\n9 B 22 B_Good\n10 B 25 B_Good\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>&nbsp;<\/strong>\u65b0\u7684<strong>\u73ed\u7ea7<\/strong>\u5217\u6839\u636e<strong>\u7403\u961f<\/strong>\u548c<strong>\u79ef\u5206<\/strong>\u5217\u4e2d\u7684\u503c\u83b7\u53d6\u503c\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u4f8b\u5982\uff0c\u7b2c\u4e00\u884c\u5728<strong>\u7403\u961f<\/strong>\u5217\u4e2d\u7684\u503c\u4e3a A\uff0c\u5e76\u4e14<strong>\u5206\u6570<\/strong>\u503c\u5927\u4e8e\u6216\u7b49\u4e8e 20\uff0c\u56e0\u6b64\u5b83\u5728\u65b0<strong>\u73ed\u7ea7<\/strong>\u5217\u4e2d\u6536\u5230\u7684\u503c\u4e3a<strong>A_Good<\/strong> \u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u8bf7\u6ce8\u610f\uff0c\u5728\u672c\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528<strong>&amp;<\/strong>\u7b26\u53f7\u4f5c\u4e3a\u201cAND\u201d\u8fd0\u7b97\u7b26\u6765\u68c0\u67e5\u4e24\u4e2a\u6761\u4ef6\u662f\u5426\u90fd\u4e3a true\uff0c\u7136\u540e\u518d\u5728<strong>\u7c7b<\/strong>\u5217\u4e2d\u5206\u914d\u503c\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u4f46\u662f\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528<strong>|<\/strong>\u7b26\u53f7\u4f5c\u4e3a\u201cOR\u201d\u8fd0\u7b97\u7b26\uff0c\u7528\u4e8e\u5728<strong>\u7c7b<\/strong>\u5217\u4e2d\u5206\u914d\u503c\u4e4b\u524d\u68c0\u67e5\u662f\u5426\u6ee1\u8db3\u4e24\u4e2a\u6761\u4ef6\u4e2d\u7684\u4efb\u4f55\u4e00\u4e2a\u3002<\/span><\/p>\n<h2><span style=\"color: #000000;\"><strong>\u5176\u4ed6\u8d44\u6e90<\/strong><\/span><\/h2>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u6559\u7a0b\u89e3\u91ca\u4e86\u5982\u4f55\u5728 dplyr \u4e2d\u6267\u884c\u5176\u4ed6\u5e38\u89c1\u4efb\u52a1\uff1a<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/cn\/dplyr-\u5982\u679c\u5305\u542b\u5219\u9759\u97f3\/\" target=\"_blank\" rel=\"noopener\">dplyr\uff1a\u5982\u679c\u5217\u5305\u542b\u5b57\u7b26\u4e32\uff0c\u5982\u4f55\u6539\u53d8\u53d8\u91cf<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/dplyr\u7a81\u53d8\u56e0\u5b50\/\" target=\"_blank\" rel=\"noopener\">dplyr\uff1a\u5982\u4f55\u4f7f\u7528 mutate() \u66f4\u6539\u56e0\u5b50\u7ea7\u522b<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/dplyr\u901a\u8fc7\/\" target=\"_blank\" rel=\"noopener\">dplyr\uff1a\u5982\u4f55\u4f7f\u7528 across() \u51fd\u6570<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u60a8\u53ef\u4ee5\u5728dplyr\u4e2d\u4f7f\u7528\u4ee5\u4e0b\u57fa\u672c\u8bed\u6cd5\u6765\u4f7f\u7528mutate()\u51fd\u6570\u6839\u636e\u591a\u4e2a\u6761\u4ef6\u521b\u5efa\u65b0\u5217\uff1a library (dpl [&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-4266","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\/ 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