{"id":2508,"date":"2023-07-21T23:33:27","date_gmt":"2023-07-21T23:33:27","guid":{"rendered":"https:\/\/statorials.org\/cn\/r%e4%b8%ad%e7%9a%84%e7%bc%a9%e6%94%be%e5%87%bd%e6%95%b0\/"},"modified":"2023-07-21T23:33:27","modified_gmt":"2023-07-21T23:33:27","slug":"r%e4%b8%ad%e7%9a%84%e7%bc%a9%e6%94%be%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/r%e4%b8%ad%e7%9a%84%e7%bc%a9%e6%94%be%e5%87%bd%e6%95%b0\/","title":{"rendered":"\u5982\u4f55\u5728 r \u4e2d\u4f7f\u7528scale()\u51fd\u6570\uff08\u9644\u793a\u4f8b\uff09"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">R\u4e2d\u7684<strong>scale()<\/strong>\u51fd\u6570\u53ef\u7528\u4e8e\u7f29\u653e\u5411\u91cf\u3001\u77e9\u9635\u6216\u6570\u636e\u6846\u4e2d\u7684\u503c\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u8be5\u51fd\u6570\u4f7f\u7528\u4ee5\u4e0b\u57fa\u672c\u8bed\u6cd5\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>scale(x, center = <span style=\"color: #008000;\">TRUE<\/span> , scale = <span style=\"color: #008000;\">TRUE<\/span> )\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u91d1\u5b50\uff1a<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\"><strong>x<\/strong> \uff1a\u8981\u7f29\u653e\u7684\u5bf9\u8c61\u7684\u540d\u79f0<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>center<\/strong> \uff1a\u7f29\u653e\u65f6\u662f\u5426\u51cf\u53bb\u5747\u503c\u3002\u9ed8\u8ba4\u503c\u4e3a TRUE\u3002<\/span><\/li>\n<li> <span style=\"color: #000000;\"><strong>scale<\/strong> \uff1a\u7f29\u653e\u65f6\u662f\u5426\u9664\u4ee5\u6807\u51c6\u5dee\u3002\u9ed8\u8ba4\u503c\u4e3a TRUE\u3002<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u8be5\u51fd\u6570\u4f7f\u7528\u4ee5\u4e0b\u516c\u5f0f\u6765\u8ba1\u7b97\u7f29\u653e\u503c\uff1a<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong><sub>\u7f29\u653e\u540e\u7684<\/sub>x = (<sub>\u539f\u59cb<\/sub>x \u2013 x\u0304) \/ s<\/strong><\/span><\/p>\n<p><span style=\"color: #000000;\">\u91d1\u5b50\uff1a<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\"><strong><sub>\u539f\u59cb<\/sub>x<\/strong> \uff1a\u539f\u59cbx\u503c<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>x\u0304<\/strong> : \u6837\u672c\u5e73\u5747\u503c<\/span><\/li>\n<li><span style=\"color: #000000;\"><strong>s<\/strong> \uff1a\u6837\u672c\u7684\u6807\u51c6\u5dee<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u8fd9\u4e5f\u79f0\u4e3a\u6570\u636e<em>\u6807\u51c6\u5316<\/em>\uff0c\u5b83\u53ea\u662f\u5c06\u6bcf\u4e2a\u539f\u59cb\u503c\u8f6c\u6362\u4e3a<a href=\"https:\/\/statorials.org\/cn\/\u89e3\u91ca-z-\u5206\u6570\/\" target=\"_blank\" rel=\"noopener\">z \u5206\u6570<\/a>\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5728\u5b9e\u8df5\u4e2d\u4f7f\u7528\u6b64\u529f\u80fd\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u793a\u4f8b 1\uff1a\u7f29\u653e\u5411\u91cf\u4e2d\u7684\u503c<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u5047\u8bbe\u6211\u4eec\u5728 R \u4e2d\u6709\u4ee5\u4e0b\u503c\u5411\u91cf\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#define vector of values<\/span>\nx &lt;- c(1, 2, 3, 4, 5, 6, 7, 8, 9)\n\n<span style=\"color: #008080;\">#view mean and standard deviation of values<\/span>\nmean(x)\n\n[1] 5\n\nsd(x)\n\n[1] 2.738613\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u4e0b\u9762\u7684\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528<strong>scale()<\/strong>\u51fd\u6570\u7f29\u653e\u5411\u91cf\u503c\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#scale the values of x\n<\/span>x_scaled &lt;- scale(x)\n\n<span style=\"color: #008080;\">#view scaled values\n<\/span>x_scaled\n\n            [,1]\n [1,] -1.4605935\n [2,] -1.0954451\n [3,] -0.7302967\n [4,] -0.3651484\n [5,] 0.0000000\n [6,] 0.3651484\n [7,] 0.7302967\n [8,] 1.0954451\n [9,] 1.4605935\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u662f\u6bcf\u4e2a\u7f29\u653e\u503c\u7684\u8ba1\u7b97\u65b9\u5f0f\uff1a<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\">\u503c 1\uff1a(1 \u2013 5) \/ 2.738613 = <strong>-1.46<\/strong><\/span><\/li>\n<li><span style=\"color: #000000;\">\u503c 2\uff1a(2 \u2013 5) \/ 2.738613 = <strong>-1.09<\/strong><\/span><\/li>\n<li><span style=\"color: #000000;\">\u503c 3\uff1a(3 \u2013 5) \/ 2.738613 = <strong>-0.73<\/strong><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u7b49\u7b49\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u8bf7\u6ce8\u610f\uff0c\u5982\u679c\u6211\u4eec\u6307\u5b9a<strong>scale=FALSE<\/strong> \uff0c\u90a3\u4e48\u8be5\u51fd\u6570\u5728\u7f29\u653e\u65f6\u4e0d\u4f1a\u9664\u4ee5\u6807\u51c6\u5dee\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#scale the values of x but don't divide by standard deviation\n<\/span>x_scaled &lt;- scale(x, scale = <span style=\"color: #008000;\">FALSE<\/span> )\n\n<span style=\"color: #008080;\">#view scaled values\n<\/span>x_scaled\n\n      [,1]\n [1,] -4\n [2,] -3\n [3,] -2\n [4,] -1\n [5,] 0\n [6,] 1\n [7,] 2\n [8,] 3\n [9,] 4\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u662f\u6bcf\u4e2a\u7f29\u653e\u503c\u7684\u8ba1\u7b97\u65b9\u5f0f\uff1a<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\">\u503c 1\uff1a1 \u2013 5 = <strong>-4<\/strong><\/span><\/li>\n<li><span style=\"color: #000000;\">\u503c 2\uff1a2 \u2013 5 = <strong>-3<\/strong><\/span><\/li>\n<li><span style=\"color: #000000;\">\u503c 3\uff1a3 \u2013 5 = <strong>-2<\/strong><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u7b49\u7b49\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u793a\u4f8b2\uff1a\u7f29\u653e\u6570\u636e\u6846\u4e2d\u7684\u5217\u503c<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u5f53\u6211\u4eec\u60f3\u8981\u7f29\u653e\u6570\u636e\u6846\u4e2d\u591a\u5217\u7684\u503c\u4ee5\u4f7f\u6bcf\u5217\u7684\u5e73\u5747\u503c\u4e3a 0\u3001\u6807\u51c6\u5dee\u4e3a 1 \u65f6\uff0c\u6211\u4eec\u4f1a\u4f7f\u7528scale()\u51fd\u6570\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u4f8b\u5982\uff0c\u5047\u8bbe\u6211\u4eec\u5728 R \u4e2d\u6709\u4ee5\u4e0b\u6570\u636e\u6846\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> (x=c(1, 2, 3, 4, 5, 6, 7, 8, 9),\n                 y=c(10, 20, 30, 40, 50, 60, 70, 80, 90))\n\n<span style=\"color: #008080;\">#view data frame\n<\/span>df\n\n  xy\n1 1 10\n2 2 20\n3 3 30\n4 4 40\n5 5 50\n6 6 60\n7 7 70\n8 8 80\n9 9 90\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u6ce8\u610f\uff0cy\u53d8\u91cf\u7684\u53d6\u503c\u8303\u56f4\u8fdc\u5927\u4e8ex\u53d8\u91cf\u7684\u53d6\u503c\u8303\u56f4\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528<strong>scale()<\/strong>\u51fd\u6570\u5bf9\u4e24\u5217\u4e2d\u7684\u503c\u8fdb\u884c\u7f29\u653e\uff0c\u4f7f\u5f97x\u548cy\u7684\u7f29\u653e\u540e\u7684\u503c\u5747\u503c\u4e3a0\uff0c\u6807\u51c6\u5dee\u4e3a1\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#scale values in each column of data frame\n<\/span>df_scaled &lt;- scale(df)\n\n<span style=\"color: #008080;\">#view scaled data frame\n<\/span>df_scaled\n\n               xy\n [1,] -1.4605935 -1.4605935\n [2,] -1.0954451 -1.0954451\n [3,] -0.7302967 -0.7302967\n [4,] -0.3651484 -0.3651484\n [5,] 0.0000000 0.0000000\n [6,] 0.3651484 0.3651484\n [7,] 0.7302967 0.7302967\n [8,] 1.0954451 1.0954451\n [9,] 1.4605935 1.4605935\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">x \u548c y \u5217\u73b0\u5728\u7684\u5e73\u5747\u503c\u4e3a 0\uff0c\u6807\u51c6\u5dee\u4e3a 1\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\u64cd\u4f5c\uff1a<\/span><\/p>\n<p><a href=\"https:\/\/statorials.org\/cn\/\u5982\u4f55\u89c4\u8303\u5316r\u4e2d\u7684\u6570\u636e\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728 R \u4e2d\u6807\u51c6\u5316\u6570\u636e<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/\u89c4\u8303\u5316-r-\u4e2d\u7684\u6570\u636e\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728 R \u4e2d\u6807\u51c6\u5316\u6570\u636e<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/r-\u4e2d\u5404\u5217\u7684\u5e73\u5747\u503c\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728 R \u4e2d\u5bf9\u5217\u8fdb\u884c\u5e73\u5747<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>R\u4e2d\u7684scale()\u51fd\u6570\u53ef\u7528\u4e8e\u7f29\u653e\u5411\u91cf\u3001\u77e9\u9635\u6216\u6570\u636e\u6846\u4e2d\u7684\u503c\u3002 \u8be5\u51fd\u6570\u4f7f\u7528\u4ee5\u4e0b\u57fa\u672c\u8bed\u6cd5\uff1a scale(x, ce [&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-2508","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 scale() \u51fd\u6570\uff08\u9644\u793a\u4f8b\uff09 - Statorials<\/title>\n<meta name=\"description\" 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