{"id":3376,"date":"2023-07-17T20:03:23","date_gmt":"2023-07-17T20:03:23","guid":{"rendered":"https:\/\/statorials.org\/cn\/%e7%ae%a1%e5%ad%90\/"},"modified":"2023-07-17T20:03:23","modified_gmt":"2023-07-17T20:03:23","slug":"%e7%ae%a1%e5%ad%90","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/%e7%ae%a1%e5%ad%90\/","title":{"rendered":"\u5982\u4f55\u5728 r \u4e2d\u4f7f\u7528\u7ba1\u9053\u8fd0\u7b97\u7b26\uff08\u9644\u793a\u4f8b\uff09"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u60a8\u53ef\u4ee5\u5728 R \u4e2d\u4f7f\u7528\u7ba1\u9053\u8fd0\u7b97\u7b26 ( <strong>%&gt;%<\/strong> ) \u5c06\u4e00\u7cfb\u5217\u64cd\u4f5c\u201c\u901a\u8fc7\u7ba1\u9053\u201d\u8fde\u63a5\u5728\u4e00\u8d77\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u8be5\u8fd0\u7b97\u7b26\u6700\u5e38\u4e0e R \u4e2d\u7684<a href=\"https:\/\/dplyr.tidyverse.org\/\" target=\"_blank\" rel=\"noopener\">dplyr<\/a>\u5305\u4e00\u8d77\u4f7f\u7528\uff0c\u4ee5\u5bf9\u6570\u636e\u5e27\u6267\u884c\u4e00\u7cfb\u5217\u64cd\u4f5c\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u7ba1\u9053\u8fd0\u7b97\u7b26\u7684\u57fa\u672c\u8bed\u6cd5\u662f\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong>df %&gt;% \n  do_this_operation %&gt;% \n  then_do_this_operation %&gt;%\n  then_do_this_operation ...<\/strong><\/span><\/pre>\n<p><span style=\"color: #000000;\">\u7ba1\u9053\u8fd0\u7b97\u7b26\u53ea\u662f\u5c06\u4e00\u4e2a\u64cd\u4f5c\u7684\u7ed3\u679c\u4f20\u9012\u5230\u5176\u4e0b\u9762\u7684\u4e0b\u4e00\u4e2a\u64cd\u4f5c\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u4f7f\u7528\u7ba1\u9053\u8fd0\u7b97\u7b26\u7684\u4f18\u70b9\u662f\u5b83\u4f7f\u4ee3\u7801\u975e\u5e38\u6613\u4e8e\u9605\u8bfb\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5728\u4e0d\u540c\u573a\u666f\u4e2d\u4f7f\u7528 R \u4e2d\u5185\u7f6e\u7684<a href=\"https:\/\/statorials.org\/cn\/mtcars-r-\u6570\u636e\u96c6\/\" target=\"_blank\" rel=\"noopener\">mtcars<\/a>\u6570\u636e\u96c6\u4f7f\u7528\u7ba1\u9053\u8fd0\u7b97\u7b26\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#view first six rows of mtcars dataset<\/span>\nhead(mtcars)\n\n                   mpg cyl disp hp drat wt qsec vs am gear carb\nMazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4\nMazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4\nDatsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1\nHornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1\nHornet Sportabout 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2\nValiant 18.1 6 225 105 2.76 3,460 20.22 1 0 3 1\n<\/strong><\/span><\/pre>\n<h2><span style=\"color: #000000;\"><strong>\u793a\u4f8b 1\uff1a\u4f7f\u7528\u7ba1\u9053\u8fd0\u7b97\u7b26\u6c47\u603b\u53d8\u91cf<\/strong><\/span><\/h2>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u7ba1\u9053\u8fd0\u7b97\u7b26 ( <strong>%&gt;%<\/strong> ) \u6309<strong>cyl<\/strong>\u53d8\u91cf\u8fdb\u884c\u5206\u7ec4\uff0c\u7136\u540e\u6c47\u603b<strong>mpg<\/strong>\u53d8\u91cf\u7684\u5e73\u5747\u503c\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\">library<\/span> (dplyr)\n\n<span style=\"color: #008080;\">#summarize mean mpg grouped by cyl<\/span>\nmtcars %&gt;% \n  group_by(cyl) %&gt;% \n  summarize(mean_mpg = mean(mpg))\n\n# A tibble: 3 x 2\n    cyl mean_mpg\n      \n1 4 26.7\n2 6 19.7\n3 8 15.1\n<\/strong><\/span><\/pre>\n<p><span style=\"color: #000000;\">\u4ece\u7ed3\u679c\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff1a<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\">\u7f38\u503c\u4e3a 4 \u7684\u6c7d\u8f66\u7684\u5e73\u5747 mpg \u503c\u4e3a<strong>26.7<\/strong> \u3002<\/span><\/li>\n<li><span style=\"color: #000000;\">\u7f38\u503c\u4e3a 6 \u7684\u6c7d\u8f66\u7684\u5e73\u5747 mpg \u503c\u4e3a<strong>19.7<\/strong> \u3002<\/span><\/li>\n<li><span style=\"color: #000000;\">\u7f38\u503c\u4e3a 8 \u7684\u6c7d\u8f66\u7684\u5e73\u5747 mpg \u503c\u4e3a<strong>15.1<\/strong> \u3002<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u8bf7\u6ce8\u610f\u7ba1\u9053\u8fd0\u7b97\u7b26\u5982\u4f55\u4f7f\u4ee3\u7801\u7684\u89e3\u91ca\u53d8\u5f97\u66f4\u5bb9\u6613\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u57fa\u672c\u4e0a\uff0c\u4ed6\u8bf4\uff1a<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\">\u91c7\u7528<strong>mtcars<\/strong>\u6570\u636e\u6846\u3002<\/span><\/li>\n<li><span style=\"color: #000000;\">\u6309<strong>cyl<\/strong>\u53d8\u91cf\u5bf9\u5176\u8fdb\u884c\u5206\u7ec4\u3002<\/span><\/li>\n<li><span style=\"color: #000000;\">\u7136\u540e\u603b\u7ed3<strong>mpg<\/strong>\u53d8\u91cf\u7684\u5e73\u5747\u503c\u3002<\/span><\/li>\n<\/ul>\n<h2><span style=\"color: #000000;\"><strong>\u793a\u4f8b 2\uff1a\u4f7f\u7528\u7ba1\u9053\u8fd0\u7b97\u7b26\u5bf9\u591a\u4e2a\u53d8\u91cf\u8fdb\u884c\u5206\u7ec4\u548c\u6c47\u603b<\/strong><\/span><\/h2>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u7ba1\u9053\u8fd0\u7b97\u7b26 ( <strong>%&gt;%<\/strong> ) \u5bf9<strong>cyl<\/strong>\u548c<strong>am<\/strong>\u53d8\u91cf\u8fdb\u884c\u5206\u7ec4\uff0c\u7136\u540e\u6c47\u603b<strong>mpg<\/strong>\u53d8\u91cf\u7684\u5e73\u5747\u503c\u548c<strong>hp<\/strong>\u53d8\u91cf\u7684\u6807\u51c6\u5dee\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\">library<\/span> (dplyr)\n\n<span style=\"color: #008080;\">#summarize mean mpg and standard dev of hp grouped by cyl and am<\/span>\nmtcars %&gt;% \n  group_by(cyl, am) %&gt;% \n  summarize(mean_mpg = mean(mpg),\n            sd_hp = sd(hp))\n\n# A tibble: 6 x 4\n# Groups: cyl[3]\n    cyl am mean_mpg sd_hp\n        \n1 4 0 22.9 19.7 \n2 4 1 28.1 22.7 \n3 6 0 19.1 9.18\n4 6 1 20.6 37.5 \n5 8 0 15.0 33.4 \n6 8 1 15.4 50.2 \n<\/strong><\/span><\/pre>\n<p><span style=\"color: #000000;\">\u4ece\u7ed3\u679c\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff1a<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\">\u5bf9\u4e8e cyl \u503c\u4e3a 4\u3001am \u503c\u4e3a 0 \u7684\u6c7d\u8f66\uff0c\u5e73\u5747 mpg \u503c\u4e3a<strong>22.9<\/strong> \uff0chp \u503c\u7684\u6807\u51c6\u504f\u5dee\u4e3a<strong>19.7<\/strong> \u3002<\/span><\/li>\n<li><span style=\"color: #000000;\">\u5bf9\u4e8e cyl \u503c\u4e3a 4\u3001am \u503c\u4e3a 1 \u7684\u6c7d\u8f66\uff0c\u5e73\u5747 mpg \u503c\u4e3a<b>28.1<\/b> \uff0chp \u503c\u7684\u6807\u51c6\u5dee\u4e3a<strong>22.7<\/strong> \u3002<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u7b49\u7b49\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u518d\u6b21\u6ce8\u610f\u7ba1\u9053\u8fd0\u7b97\u7b26\u5982\u4f55\u4f7f\u4ee3\u7801\u7684\u89e3\u91ca\u53d8\u5f97\u66f4\u5bb9\u6613\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u57fa\u672c\u4e0a\uff0c\u4ed6\u8bf4\uff1a<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\">\u91c7\u7528<strong>mtcars<\/strong>\u6570\u636e\u6846\u3002<\/span><\/li>\n<li><span style=\"color: #000000;\">\u6309\u53d8\u91cf<strong>cyl<\/strong>\u548c<strong>am<\/strong>\u5bf9\u5176\u8fdb\u884c\u5206\u7ec4\u3002<\/span><\/li>\n<li><span style=\"color: #000000;\">\u7136\u540e\u603b\u7ed3<strong>mpg<\/strong>\u53d8\u91cf\u7684\u5e73\u5747\u503c\u548c<strong>hp<\/strong>\u53d8\u91cf\u7684\u6807\u51c6\u5dee\u3002<\/span><\/li>\n<\/ul>\n<h2><span style=\"color: #000000;\"><strong>\u793a\u4f8b 3\uff1a\u4f7f\u7528\u7ba1\u9053\u8fd0\u7b97\u7b26\u521b\u5efa\u65b0\u53d8\u91cf<\/strong><\/span><\/h2>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u4ee3\u7801\u6f14\u793a\u4e86\u5982\u4f55\u5c06\u7ba1\u9053\u8fd0\u7b97\u7b26 ( <strong>%&gt;%<\/strong> ) \u4e0e<strong>dplyr<\/strong>\u5305\u4e2d\u7684<a href=\"https:\/\/statorials.org\/cn\/\u5982\u4f55\u4f7f\u7528-mutate-\u5728-r-\u4e2d\u521b\u5efa\u65b0\u53d8\u91cf\/\" target=\"_blank\" rel=\"noopener\">mutate<\/a>\u51fd\u6570\u7ed3\u5408\u4f7f\u7528\uff0c\u5728 mtcars \u6570\u636e\u6846\u4e2d\u521b\u5efa\u4e24\u4e2a\u65b0\u53d8\u91cf\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008000;\">library<\/span> (dplyr)\n\n<span style=\"color: #008080;\">#add two new variables in mtcars\n<span style=\"color: #000000;\">new_mtcars &lt;- mtcars %&gt;%\n                mutate(mpg2 = mpg*2,\n                       mpg_root = sqrt(mpg))<\/span>\n\n#view first six rows of new data frame\n<span style=\"color: #000000;\">head(new_mtcars)\n\n   mpg cyl disp hp drat wt qsec vs am gear carb mpg2 mpg_root\n1 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4 42.0 4.582576\n2 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4 42.0 4.582576\n3 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1 45.6 4.774935\n4 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1 42.8 4.626013\n5 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2 37.4 4.324350\n6 18.1 6 225 105 2.76 3.460 20.22 1 0 3 1 36.2 4.254409<\/span><\/span><\/strong><\/span><\/pre>\n<p><span style=\"color: #000000;\">\u4ece\u7ed3\u679c\u6211\u4eec\u53ef\u4ee5\u770b\u51fa\uff1a<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\"><span style=\"color: #000000;\">\u65b0\u7684<strong>mpg2<\/strong>\u5217\u5305\u542b<strong>mpg<\/strong>\u5217\u4e58\u4ee5 2 \u7684\u503c\u3002<\/span><\/span><\/li>\n<li><span style=\"color: #000000;\">\u65b0\u7684<strong>mpg_root<\/strong>\u5217\u5305\u542b<strong>mpg<\/strong>\u5217\u4e2d\u7684\u503c\u7684\u5e73\u65b9\u6839\u3002<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u518d\u6b21\u6ce8\u610f\u7ba1\u9053\u8fd0\u7b97\u7b26\u5982\u4f55\u4f7f\u4ee3\u7801\u7684\u89e3\u91ca\u53d8\u5f97\u66f4\u5bb9\u6613\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u57fa\u672c\u4e0a\uff0c\u4ed6\u8bf4\uff1a<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\">\u91c7\u7528<strong>mtcars<\/strong>\u6570\u636e\u6846\u3002<\/span><\/li>\n<li><span style=\"color: #000000;\"><span style=\"color: #000000;\">\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a<strong>mpg2<\/strong>\u7684\u65b0\u5217\u548c\u4e00\u4e2a\u540d\u4e3a<strong>mpg_root<\/strong>\u7684\u65b0\u5217\u3002<\/span><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\"><strong>\u76f8\u5173\uff1a<\/strong><a href=\"https:\/\/statorials.org\/cn\/r-dplyr-\u5b17\u53d8\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728 dplyr \u4e2d\u4f7f\u7528 transmute() \u51fd\u6570<\/a><\/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\u4f7f\u7528 R \u4e2d\u7684\u5176\u4ed6\u5e38\u7528\u51fd\u6570\uff1a<\/span><\/p>\n<p><a href=\"https:\/\/statorials.org\/cn\/\u6ce2\u5f62\u7b26\u6539\u4e3a-r\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728 R \u4e2d\u4f7f\u7528\u6ce2\u6d6a\u53f7\u8fd0\u7b97\u7b26 (~)<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/\u7f8e\u5143\u7b26\u53f7-r\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728 R \u4e2d\u4f7f\u7528\u7f8e\u5143\u7b26\u53f7\u8fd0\u7b97\u7b26 ($)<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/\u4e0d\u5728-r-\u4e2d\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728 R \u4e2d\u4f7f\u7528\u201cNOT IN\u201d\u8fd0\u7b97\u7b26<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/r-\u4e2d\u7684-in-\u8fd0\u7b97\u7b26\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728 R \u4e2d\u4f7f\u7528 %in% \u8fd0\u7b97\u7b26<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u60a8\u53ef\u4ee5\u5728 R \u4e2d\u4f7f\u7528\u7ba1\u9053\u8fd0\u7b97\u7b26 ( %&gt;% ) \u5c06\u4e00\u7cfb\u5217\u64cd\u4f5c\u201c\u901a\u8fc7\u7ba1\u9053\u201d\u8fde\u63a5\u5728\u4e00\u8d77\u3002 \u8be5\u8fd0\u7b97\u7b26\u6700\u5e38\u4e0e R [&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-3376","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>\u5982\u4f55\u5728 R \u4e2d\u4f7f\u7528\u7ba1\u9053\u8fd0\u7b97\u7b26\uff08\u5e26\u793a\u4f8b\uff09 - Statory<\/title>\n<meta name=\"description\" content=\"\u672c\u6559\u7a0b\u901a\u8fc7\u51e0\u4e2a\u793a\u4f8b\u89e3\u91ca\u4e86\u5982\u4f55\u5728 R \u4e2d\u4f7f\u7528\u7ba1\u9053\u8fd0\u7b97\u7b26\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\/\u7ba1\u5b50\/\" \/>\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\u4f7f\u7528\u7ba1\u9053\u8fd0\u7b97\u7b26\uff08\u5e26\u793a\u4f8b\uff09 - Statory\" \/>\n<meta property=\"og:description\" content=\"\u672c\u6559\u7a0b\u901a\u8fc7\u51e0\u4e2a\u793a\u4f8b\u89e3\u91ca\u4e86\u5982\u4f55\u5728 R \u4e2d\u4f7f\u7528\u7ba1\u9053\u8fd0\u7b97\u7b26\u3002\" \/>\n<meta property=\"og:url\" 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