{"id":1996,"date":"2023-07-24T03:59:25","date_gmt":"2023-07-24T03:59:25","guid":{"rendered":"https:\/\/statorials.org\/cn\/r-%e6%8c%89%e7%b4%a2%e5%bc%95%e9%80%89%e6%8b%a9%e5%88%97\/"},"modified":"2023-07-24T03:59:25","modified_gmt":"2023-07-24T03:59:25","slug":"r-%e6%8c%89%e7%b4%a2%e5%bc%95%e9%80%89%e6%8b%a9%e5%88%97","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/r-%e6%8c%89%e7%b4%a2%e5%bc%95%e9%80%89%e6%8b%a9%e5%88%97\/","title":{"rendered":"\u5982\u4f55\u5728 r \u4e2d\u6309\u7d22\u5f15\u9009\u62e9\u5217\uff08\u9644\u793a\u4f8b\uff09"},"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\u6309\u7d22\u5f15\u9009\u62e9\u5217\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#select specific columns by index\n<\/span>df[, c(1, 4)]\n\n<span style=\"color: #008080;\">#select specific columns in index range\n<\/span>df[, 1:3]\n\n<span style=\"color: #008080;\">#exclude specific columns by index\n<\/span>df[, -c(2, 5)]\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5728\u5b9e\u8df5\u4e2d\u4f7f\u7528\u4ee5\u4e0b\u6570\u636e\u6846\u4f7f\u7528\u6b64\u8bed\u6cd5\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#create data frame<\/span>\ndf &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (team=c('A', 'B', 'C', 'D', 'E'),\n                 points=c(99, 90, 86, 88, 95),\n                 assists=c(33, 28, 31, 39, 34),\n                 rebounds=c(30, 28, 24, 24, 28),\n                 blocks=c(7, 7, 5, 9, 13))\n\n<span style=\"color: #008080;\">#view data frame<\/span>\ndf\n\n  team points assists rebounds blocks\n1 A 99 33 30 7\n2 B 90 28 28 7\n3 C 86 31 24 5\n4 D 88 39 24 9\n5 E 95 34 28 13\n<\/strong><\/pre>\n<h3><span style=\"color: #000000;\"><strong>\u793a\u4f8b1\uff1a\u6309\u7d22\u5f15\u9009\u62e9\u5217<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u901a\u8fc7\u7d22\u5f15\u9009\u62e9\u7279\u5b9a\u5217\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#select columns in 1st and 4th position<\/span>\ndf[, c(1, 4)]\n\n  team rebounds\n1 to 30\n2 B 28\n3 C 24\n4 D 24\n5 E 28\n<\/strong><\/pre>\n<h3><span style=\"color: #000000;\"><strong>\u793a\u4f8b 2\uff1a\u4ece\u7d22\u5f15\u8303\u56f4\u4e2d\u9009\u62e9\u5217<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u4ee3\u7801\u663e\u793a\u5982\u4f55\u9009\u62e9\u7d22\u5f15\u8303\u56f4\u4e2d\u7684\u7279\u5b9a\u5217\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\"><span style=\"color: #008080;\">#select columns in positions 1 through 3<\/span>\n<span style=\"color: #000000;\">df[, 1:3]\n\n  team points assists\n1 A 99 33\n2 B 90 28\n3 C 86 31\n4 D 88 39\n5 E 95 34<\/span><\/span><\/strong><\/pre>\n<h3><strong>\u793a\u4f8b 3\uff1a\u6309\u7d22\u5f15\u6392\u9664\u5217<\/strong><\/h3>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u4ee3\u7801\u663e\u793a\u5982\u4f55\u901a\u8fc7\u7d22\u5f15\u6392\u9664\u7279\u5b9a\u5217\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#select all columns except columns in positions 2 and 5\n<span style=\"color: #000000;\">df[, -c(2, 5)]\n\n  team assists rebounds\n1 to 33 30\n2 B 28 28\n3 C 31 24\n4 D 39 24\n5 E 34 28\n<\/span><\/span><\/strong><\/pre>\n<p><span style=\"color: #000000;\"><span style=\"color: #000000;\">\u8bf7\u6ce8\u610f\uff0c\u8fd9\u5c06\u8fd4\u56de\u6570\u636e\u6846\u4e2d\u9664\u7d22\u5f15\u4f4d\u7f6e 2 \u548c 5 \u5904\u7684\u5217\u4e4b\u5916\u7684\u6240\u6709\u5217\u3002<\/span><\/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\u5bf9\u6570\u636e\u6846\u5217\u6267\u884c\u5176\u4ed6\u5e38\u89c1\u64cd\u4f5c\uff1a<\/span><\/p>\n<p><a href=\"https:\/\/statorials.org\/cn\/r-\u6eda\u52a8\u67f1\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u4eceR\u4e2d\u7684\u6570\u636e\u6846\u4e2d\u5220\u9664\u5217<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/\u5728r\u4e2d\u5207\u6362\u4e24\u5217\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u66f4\u6539 R \u4e2d\u7684\u4e24\u5217<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/r-\u5c06\u4e24\u5217\u5408\u5e76\u4e3a\u4e00\u5217\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728R\u4e2d\u5c06\u4e24\u5217\u5408\u5e76\u4e3a\u4e00\u5217<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u57fa\u672c\u8bed\u6cd5\u5728 R \u4e2d\u6309\u7d22\u5f15\u9009\u62e9\u5217\uff1a #select specific columns by ind [&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-1996","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\u6309\u7d22\u5f15\u9009\u62e9\u5217\uff08\u5e26\u6709\u793a\u4f8b\uff09 - Statory<\/title>\n<meta name=\"description\" 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