{"id":1993,"date":"2023-07-24T04:18:55","date_gmt":"2023-07-24T04:18:55","guid":{"rendered":"https:\/\/statorials.org\/cn\/%e9%87%8d%e5%91%bd%e5%90%8d-r-%e5%9b%a0%e5%ad%90%e6%b0%b4%e5%b9%b3\/"},"modified":"2023-07-24T04:18:55","modified_gmt":"2023-07-24T04:18:55","slug":"%e9%87%8d%e5%91%bd%e5%90%8d-r-%e5%9b%a0%e5%ad%90%e6%b0%b4%e5%b9%b3","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/%e9%87%8d%e5%91%bd%e5%90%8d-r-%e5%9b%a0%e5%ad%90%e6%b0%b4%e5%b9%b3\/","title":{"rendered":"\u5982\u4f55\u5728 r \u4e2d\u91cd\u547d\u540d\u56e0\u5b50\u6c34\u5e73\uff08\u9644\u793a\u4f8b\uff09"},"content":{"rendered":"

<\/p>\n

\n

\u60a8\u53ef\u4ee5\u4f7f\u7528\u4e24\u79cd\u65b9\u6cd5\u6765\u91cd\u547d\u540d R \u4e2d\u7684\u56e0\u5b50\u6c34\u5e73\uff1a<\/span><\/p>\n

\u65b9\u6cd51\uff1a\u4f7f\u7528Base Rlevels()<\/strong><\/span><\/p>\n

 levels(df$col_name) <- c(' new_name1<\/span> ', ' new_name2<\/span> ', ' new_name3<\/span> ')<\/strong><\/pre>\n
\u65b9\u6cd5 2\uff1a\u4f7f\u7528 dplyr \u5305\u4e2d\u7684 recode()<\/strong><\/span><\/p>\n
 library<\/span> (dplyr)\n\ndata$col_name <- recode(data$col_name, name1 = ' new_name1<\/span> ', \n                                       name2 = ' new_name2<\/span> ',\n                                       name3 = ' new_name3<\/span> ')<\/b><\/span><\/span><\/pre>\n
\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5728\u5b9e\u8df5\u4e2d\u4f7f\u7528\u6bcf\u79cd\u65b9\u6cd5\u3002<\/span><\/p>\n
\u65b9\u6cd51\uff1a\u4f7f\u7528levels()\u51fd\u6570<\/strong><\/span><\/h3>\n
\u5047\u8bbe\u6211\u4eec\u5728 R \u4e2d\u6709\u4ee5\u4e0b\u6570\u636e\u6846\uff1a<\/span><\/p>\n
 #create data frame<\/span>\ndf <- data. frame<\/span> (conf = factor(c('North', 'East', 'South', 'West')),\n                 points = c(34, 55, 41, 28))\n\n#view data frame<\/span>\ndf\n\n   conf points\n1 North 34\n2 East 55\n3 South 41\n4 West 28\n\n#view levels of 'conf' variable<\/span>\nlevels(df$conf)\n\n[1] \u201cEast\u201d \u201cNorth\u201d \u201cSouth\u201d \u201cWest\u201d<\/strong>\n<\/pre>\n
\u4ee5\u4e0b\u4ee3\u7801\u663e\u793a\u5982\u4f55\u4f7f\u7528levels()\u51fd\u6570<\/strong>\u6309\u540d\u79f0\u91cd\u547d\u540d\u56e0\u5b50\u7ea7\u522b\uff1a<\/span><\/p>\n
 #rename just 'North' factor level<\/span>\nlevels(df$conf)[levels(df$conf)==' North<\/span> '] <- ' N<\/span> '\n\n#view levels of 'conf' variable<\/span>\nlevels(df$conf)\n\n[1] \u201cEast\u201d \u201cN\u201d \u201cSouth\u201d \u201cWest\u201d<\/strong>\n<\/pre>\n
\u4ee5\u4e0b\u4ee3\u7801\u663e\u793a\u4e86\u5982\u4f55\u91cd\u547d\u540d\u6bcf\u4e2a\u56e0\u5b50\u7ea7\u522b\uff1a<\/span><\/p>\n
 #rename every factor level<\/span>\nlevels(df$conf) <- c(' N<\/span> ', ' E<\/span> ', ' S<\/span> ', ' W<\/span> ')\n\n#view levels of 'conf' variable<\/span>\nlevels(df$conf)\n\n[1] \u201cN\u201d \u201cE\u201d \u201cS\u201d \u201cW\u201d<\/strong>\n<\/pre>\n
\u793a\u4f8b 2\uff1a\u4f7f\u7528 recode() \u51fd\u6570<\/strong><\/span><\/h3>\n
\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528 dplyr \u5305\u7684recode()<\/strong>\u51fd\u6570\u91cd\u547d\u540d\u56e0\u5b50\u7ea7\u522b\uff1a<\/span><\/p>\n
 library<\/span> (dplyr)<\/span>\n\n#create data frame<\/span>\ndf <- data. frame<\/span> (conf = factor(c('North', 'East', 'South', 'West')),\n                 points = c(34, 55, 41, 28))\n\n#recode factor levels\n<\/span>df$conf <- recode(df$conf, North = ' N<\/span> ',\n                           East = ' E<\/span> ',\n                           South = ' S<\/span> ',\n                           West = ' W<\/span> ')\n\nlevels(df$conf)\n\n[1] \u201cE\u201d \u201cN\u201d \u201cS\u201d \u201cW\u201d\n<\/strong><\/pre>\n
\u6ce8\u610f<\/strong>\uff1a\u60a8\u53ef\u4ee5\u5728\u6b64\u5904<\/a>\u627e\u5230 recode() \u51fd\u6570\u7684\u5b8c\u6574\u6587\u6863\u3002<\/span><\/p>\n
\u5176\u4ed6\u8d44\u6e90<\/strong><\/span><\/h3>\n
\u5982\u4f55\u5728 R \u4e2d\u5c06\u56e0\u5b50\u8f6c\u6362\u4e3a\u6570\u5b57<\/a>
R\u4e2d\u5982\u4f55\u5c06\u56e0\u5b50\u8f6c\u6362\u4e3a\u5b57\u7b26<\/a>
\u5982\u4f55\u5728 R \u4e2d\u91cd\u65b0\u6392\u5217\u56e0\u5b50\u6c34\u5e73<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
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