{"id":1865,"date":"2023-07-24T16:39:05","date_gmt":"2023-07-24T16:39:05","guid":{"rendered":"https:\/\/statorials.org\/cn\/%e7%99%bb%e5%bd%95-r\/"},"modified":"2023-07-24T16:39:05","modified_gmt":"2023-07-24T16:39:05","slug":"%e7%99%bb%e5%bd%95-r","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/%e7%99%bb%e5%bd%95-r\/","title":{"rendered":"\u5982\u4f55\u8ba1\u7b97 r \u8fde\u63a5\uff08\u9644\u793a\u4f8b\uff09"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u60a8\u53ef\u4ee5\u4f7f\u7528 R \u4e2d\u7684<strong>log()<\/strong>\u51fd\u6570\u6765\u8ba1\u7b97\u5177\u6709\u6307\u5b9a\u5e95\u6570\u7684\u503c\u7684\u5bf9\u6570\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#calculate log of 9 with base 3<\/span>\nlog(9, base=3)\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u5982\u679c\u4e0d\u6307\u5b9a\u57fa\u6570\uff0cR \u5c06\u4f7f\u7528<em>e<\/em>\u7684\u9ed8\u8ba4\u57fa\u503c\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#calculate log of 9 with base <em>e<\/em><\/span>\nlog(9)\n\n[1] 2.197225\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\u529f\u80fd\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u793a\u4f8b1\uff1a\u8ba1\u7b97\u5355\u4e2a\u503c\u7684\u5bf9\u6570<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u4e0d\u540c\u57fa\u6570\u8ba1\u7b97 R \u4e2d\u5404\u4e2a\u503c\u7684\u5bf9\u6570\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#calculate log of 100 with base <em>e<\/em><\/span>\nlog(100)\n\n[1] 4.60517\n\n<span style=\"color: #008080;\">#calculate log of 100 with base 10\n<\/span>log(100, base=10)\n\n[1] 2\n\n<span style=\"color: #008080;\">#calculate log of 100 with base 3\n<\/span>log(100, base=3)\n\n[1] 4.191807\n<\/strong><\/pre>\n<h3><span style=\"color: #000000;\"><strong>\u793a\u4f8b 2\uff1a\u8ba1\u7b97\u5411\u91cf\u4e2d\u7684\u5bf9\u6570\u503c<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u4ee3\u7801\u663e\u793a\u4e86\u5982\u4f55\u8ba1\u7b97 R \u4e2d\u5411\u91cf\u7684\u6bcf\u4e2a\u503c\u7684\u5bf9\u6570\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#definevector\n<span style=\"color: #000000;\">x &lt;- c(3, 6, 12, 16, 28, 45)<\/span>\n\n#calculate log of each value in vector with base <em>e<\/em><\/span>\nlog(x)\n\n[1] 1.098612 1.791759 2.484907 2.772589 3.332205 3.806662\n<\/strong><\/pre>\n<h3><span style=\"color: #000000;\"><strong>\u793a\u4f8b3\uff1a\u8ba1\u7b97\u6570\u636e\u6846\u4e2d\u7684\u65e5\u5fd7\u503c<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u4e0b\u9762\u7684\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u5728R\u4e2d\u8ba1\u7b97\u6570\u636e\u5e27\u7684\u7279\u5b9a\u5217\u4e2d\u7684\u5bf9\u6570\u503c\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#define data frame\n<span style=\"color: #000000;\">df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (var1=c(1, 3, 3, 4, 5),\n                 var2=c(7, 7, 8, 3, 2),\n                 var3=c(3, 3, 6, 6, 8),\n                 var4=c(1, 1, 2, 8, 9))\n\n<span style=\"color: #008080;\">#calculate log of each value in 'var1' column\n<\/span>log(df$var1, base=10)<\/span>\n\n<span style=\"color: #000000;\">[1] 0.0000000 0.4771213 0.4771213 0.6020600 0.6989700\n<\/span><\/span><\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u4e0b\u9762\u7684\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528<strong>sapply()<\/strong>\u51fd\u6570\u6765\u8ba1\u7b97\u6570\u636e\u6846\u6bcf\u4e00\u5217\u4e2d\u7684\u65e5\u5fd7\u503c\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#define data frame\n<span style=\"color: #000000;\">df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (var1=c(1, 3, 3, 4, 5),\n                 var2=c(7, 7, 8, 3, 2),\n                 var3=c(3, 3, 6, 6, 8),\n                 var4=c(1, 1, 2, 8, 9))\n\n<span style=\"color: #008080;\">#calculate log of values in every column\n<\/span>sapply(df, <span style=\"color: #008000;\">function<\/span> (x) log(x, base=10))\n\n          var1 var2 var3 var4\n[1,] 0.0000000 0.8450980 0.4771213 0.0000000\n[2,] 0.4771213 0.8450980 0.4771213 0.0000000\n[3,] 0.4771213 0.9030900 0.7781513 0.3010300\n[4,] 0.6020600 0.4771213 0.7781513 0.9030900\n[5,] 0.6989700 0.3010300 0.9030900 0.9542425\n<\/span><\/span><\/strong><\/pre>\n<h3><span style=\"color: #000000;\"><strong>\u5176\u4ed6\u8d44\u6e90<\/strong><\/span><\/h3>\n<p><a href=\"https:\/\/statorials.org\/cn\/\u5c06\u6570\u636e\u8f6c\u6362\u4e3ar\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728 R \u4e2d\u8f6c\u6362\u6570\u636e\uff08\u5bf9\u6570\u3001\u5e73\u65b9\u6839\u3001\u7acb\u65b9\u6839\uff09<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/r-sqrt\u4e2d\u7684\u5e73\u65b9\u6839\u51fd\u6570\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728R\u4e2d\u4f7f\u7528\u5e73\u65b9\u6839\u51fd\u6570<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/r-\u4e2d\u7684\u53cd\u5bf9\u6570\/\" target=\"_blank\" rel=\"noopener\">\u5982\u4f55\u5728R\u4e2d\u627e\u5230\u503c\u7684\u53cd\u5bf9\u8bcd<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u60a8\u53ef\u4ee5\u4f7f\u7528 R \u4e2d\u7684log()\u51fd\u6570\u6765\u8ba1\u7b97\u5177\u6709\u6307\u5b9a\u5e95\u6570\u7684\u503c\u7684\u5bf9\u6570\uff1a #calculate log of 9 wi [&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-1865","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\u8ba1\u7b97 R \u4e2d\u7684\u5bf9\u6570\uff08\u9644\u793a\u4f8b\uff09- Statory<\/title>\n<meta name=\"description\" content=\"\u672c\u6559\u7a0b\u901a\u8fc7\u51e0\u4e2a\u793a\u4f8b\u89e3\u91ca\u4e86\u5982\u4f55\u4f7f\u7528 log() \u51fd\u6570\u8ba1\u7b97 R \u4e2d\u7684\u5bf9\u6570\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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