{"id":1138,"date":"2023-07-27T13:14:18","date_gmt":"2023-07-27T13:14:18","guid":{"rendered":"https:\/\/statorials.org\/cn\/r-%e7%9a%84%e6%b5%b7%e6%bb%a9\/"},"modified":"2023-07-27T13:14:18","modified_gmt":"2023-07-27T13:14:18","slug":"r-%e7%9a%84%e6%b5%b7%e6%bb%a9","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/r-%e7%9a%84%e6%b5%b7%e6%bb%a9\/","title":{"rendered":"\u5982\u4f55\u5728 r \u4e2d\u67e5\u627e\u8303\u56f4\uff08\u9644\u793a\u4f8b\uff09"},"content":{"rendered":"

<\/p>\n

\n

\u6781\u5dee<\/strong>\u662f\u6570\u636e\u96c6\u4e2d\u7684\u6700\u5927\u503c\u548c\u6700\u5c0f\u503c\u4e4b\u95f4\u7684\u5dee\u3002<\/span><\/p>\n

\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u6765\u67e5\u627e R \u4e2d\u6570\u636e\u96c6\u7684\u8303\u56f4\uff1a<\/span><\/p>\n

 data <- c(1, 3, NA, 5, 16, 18, 22, 25, 29)\n\n#calculate range<\/span>\nmax(data, na. rm<\/span> = TRUE<\/span> ) - min(data, na. rm<\/span> = TRUE<\/span> )\n\n[1] 28<\/strong><\/pre>\n
\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u57faR\u4e2d\u7684range()<\/strong>\u51fd\u6570\u6765\u663e\u793a\u6570\u636e\u96c6\u4e2d\u7684\u6700\u5c0f\u548c\u6700\u5927\u503c\uff1a<\/span><\/p>\n
 data <- c(1, 3, NA, 5, 16, 18, 22, 25, 29)\n\n#calculate range values<\/span>\nrange(data, na. rm<\/span> = TRUE<\/span> )\n\n[1] 1 29<\/strong><\/pre>\n
\u672c\u6559\u7a0b\u5c55\u793a\u4e86\u5728 R \u4e2d\u8ba1\u7b97\u6570\u636e\u96c6\u8303\u56f4\u7684\u51e0\u4e2a\u793a\u4f8b\u3002<\/span><\/p>\n
\u76f8\u5173\uff1a<\/strong>\u7edf\u8ba1\u4e2d\u7684\u5206\u6563\u6d4b\u91cf<\/span><\/p>\n
\u793a\u4f8b 1\uff1a\u8ba1\u7b97\u5355\u4e2a\u53d8\u91cf\u7684\u8303\u56f4<\/strong><\/span><\/h2>\n
\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u8ba1\u7b97 R \u4e2d\u5355\u4e2a\u53d8\u91cf\u7684\u8303\u56f4\uff1a<\/span><\/p>\n
 #create data frame<\/span>\ndf <- data. frame<\/span> (x=c(1, 3, NA, 5, 16, 18, 22, 25),\n                 y=c(NA, 4, 8, 9, 14, 23, 29, 31),\n                 z=c(2, NA, 9, 4, 13, 17, 22, 24))\n\n#find range of variable x<\/em> in the data frame\n<\/span>max(df$x, na. rm<\/span> = TRUE<\/span> ) - min(df$x, na. rm<\/span> = TRUE<\/span> )\n\n[1] 24<\/strong><\/pre>\n
\u793a\u4f8b 2\uff1a\u8ba1\u7b97\u591a\u4e2a\u53d8\u91cf\u7684\u8303\u56f4<\/strong><\/span><\/h2>\n
\u4e0b\u9762\u7684\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u5728R\u4e2d\u8ba1\u7b97\u591a\u4e2a\u53d8\u91cf\u7684\u8303\u56f4\uff1a<\/span><\/p>\n
 #create data frame<\/span>\ndf <- data. frame<\/span> (x=c(1, 3, NA, 5, 16, 18, 22, 25),\n                 y=c(NA, 4, 8, 9, 14, 23, 29, 31),\n                 z=c(2, NA, 9, 4, 13, 17, 22, 24))\n\n#find range of variable x<\/em> and y<\/em> in the data frame\n<\/span>sapply(df[c(' x<\/span> ',' y<\/span> ')], function<\/span> (df) max(df, na.rm= TRUE<\/span> ) - min(df, na.rm= TRUE<\/span> ))\n\n xy\n24 27 \n\n#find range of all variables in the data frame\n<\/span>sapply(df, function<\/span> (df) max(df, na.rm= TRUE<\/span> ) - min(df, na.rm= TRUE<\/span> ))\n\n X Y Z\n24 27 22 \n<\/strong><\/pre>\n
 R \u4e2d<\/a>apply()\u3001lapply() \u3001<\/strong> sapply() \u548c tapply() \u7684\u6307\u5357<\/span><\/p>\n
\u793a\u4f8b3\uff1a\u8ba1\u7b97\u6574\u4e2a\u6570\u636e\u6846\u7684\u8303\u56f4<\/strong><\/span><\/h2>\n
\u4e0b\u9762\u7684\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u8ba1\u7b97\u4e00\u4e2a\u6570\u636e\u6846\u4e2d\u6240\u6709\u503c\u7684\u8303\u56f4\uff1a<\/span><\/p>\n
 #create data frame<\/span>\ndf <- data.frame(x=c(1, 3, NA, 5, 16, 18, 22, 25),\n                 y=c(NA, 4, 8, 9, 14, 23, 29, 31),\n                 z=c(2, NA, 9, 4, 13, 17, 22, 24))\n\n#find range of all values in entire data frame\n<\/span>max(df, na.rm= TRUE<\/span> ) - min(df, na.rm= TRUE<\/span> )\n\n[1] 30<\/strong><\/pre>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6574\u4e2a\u6570\u636e\u5757\u7684\u8303\u56f4\u662f 31 \u2013 1 = 30<\/strong> \u3002<\/span><\/p>\n
\u5176\u4ed6\u8d44\u6e90<\/strong><\/h2>\n
\u4ee5\u4e0b\u6559\u7a0b\u89e3\u91ca\u4e86\u5982\u4f55\u5728 R \u4e2d\u6267\u884c\u5176\u4ed6\u5e38\u89c1\u4efb\u52a1\uff1a<\/span><\/p>\n
\u5982\u4f55\u8ba1\u7b97R\u4e2d\u7684\u56db\u5206\u4f4d\u6570\u8303\u56f4<\/a>
\u5982\u4f55\u8ba1\u7b97 R \u4e2d\u7684\u6807\u51c6\u5dee<\/a>
\u5982\u4f55\u5728 R \u4e2d\u8ba1\u7b97\u767e\u5206\u4f4d\u6570<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u6781\u5dee\u662f\u6570\u636e\u96c6\u4e2d\u7684\u6700\u5927\u503c\u548c\u6700\u5c0f\u503c\u4e4b\u95f4\u7684\u5dee\u3002 \u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u6765\u67e5\u627e R \u4e2d\u6570\u636e\u96c6\u7684\u8303\u56f4\uff1a data < […]<\/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-1138","post","type-post","status-publish","format-standard","hentry","category-11"],"yoast_head":"\n\u5982\u4f55\u5728 R \u4e2d\u67e5\u627e\u8303\u56f4\uff08\u9644\u793a\u4f8b\uff09-Statorials<\/title>\n<meta name=\"description\" content=\"\u672c\u6559\u7a0b\u901a\u8fc7\u51e0\u4e2a\u793a\u4f8b\u89e3\u91ca\u4e86\u5982\u4f55\u5728 R \u4e2d\u8ba1\u7b97\u8303\u56f4\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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