{"id":1279,"date":"2023-07-27T01:12:32","date_gmt":"2023-07-27T01:12:32","guid":{"rendered":"https:\/\/statorials.org\/cn\/%e6%9b%b4%e6%94%b9r%e4%b8%ad%e7%9a%84%e8%a1%8c%e5%90%8d%e7%a7%b0\/"},"modified":"2023-07-27T01:12:32","modified_gmt":"2023-07-27T01:12:32","slug":"%e6%9b%b4%e6%94%b9r%e4%b8%ad%e7%9a%84%e8%a1%8c%e5%90%8d%e7%a7%b0","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/%e6%9b%b4%e6%94%b9r%e4%b8%ad%e7%9a%84%e8%a1%8c%e5%90%8d%e7%a7%b0\/","title":{"rendered":"\u5982\u4f55\u66f4\u6539 r \u4e2d\u7684\u884c\u540d\u79f0\uff08\u9644\u793a\u4f8b\uff09"},"content":{"rendered":"

<\/p>\n

\n

\u60a8\u53ef\u4ee5\u4f7f\u7528row.names()<\/strong>\u51fd\u6570\u5feb\u901f\u83b7\u53d6\u548c\u8bbe\u7f6e R \u4e2d\u6570\u636e\u6846\u7684\u884c\u540d\u79f0\u3002<\/span><\/p>\n

\u672c\u6559\u7a0b\u63d0\u4f9b\u4e86\u5728 R \u5185\u7f6e\u7684mtcars<\/strong>\u6570\u636e\u96c6\u4e0a\u5b9e\u9645\u4f7f\u7528\u6b64\u51fd\u6570\u7684\u51e0\u4e2a\u793a\u4f8b\uff1a<\/span><\/p>\n

 #view first six rows of mtcars<\/em><\/span>\nhead(mtcars)\n\n                   mpg cyl disp hp drat wt qsec vs am gear carb\nMazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4\nMazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4\nDatsun 710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1\nHornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1\nHornet Sportabout 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2\nValiant 18.1 6 225 105 2.76 3,460 20.22 1 0 3 1<\/strong><\/pre>\n
\u5982\u4f55\u83b7\u53d6\u884c\u540d\u79f0<\/strong><\/span><\/h3>\n
\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u663e\u793amtcars<\/em>\u6570\u636e\u6846\u7684\u7b2c\u4e00\u884c\u540d\u79f0\uff1a<\/span><\/p>\n
 #view first six row names of mtcars<\/em><\/span>\nhead( row<\/span> . names<\/span> (mtcars))\n\n[1] \"Mazda RX4\" \"Mazda RX4 Wag\" \"Datsun 710\"       \n[4] \"Hornet 4 Drive\" \"Hornet Sportabout\" \"Valiant\" \n<\/strong><\/pre>\n
\u5982\u4f55\u66f4\u6539\u7ebf\u8def\u540d\u79f0<\/strong><\/span><\/h3>\n
\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u6765\u4fee\u6539\u7279\u5b9a\u7684\u884c\u540d\u79f0\uff1a<\/span><\/p>\n
 #change the row name called Datsun710<\/em> to 710<\/em>\n<\/span>row<\/span> . names<\/span> (mtcars)[ row<\/span> . names<\/span> (mtcars) == \" Datsun 710<\/span> \"] <- \" 710<\/span> \"\n\n#view first six row names of mtcars<\/em><\/span> \nhead(mtcars)\n\n                   mpg cyl disp hp drat wt qsec vs am gear carb\nMazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4\nMazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4\n710 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1\nHornet 4 Drive 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1\nHornet Sportabout 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2\nValiant 18.1 6 225 105 2.76 3,460 20.22 1 0 3 1\n<\/strong><\/pre>\n
\u5982\u4f55\u66f4\u6539\u6240\u6709\u884c\u540d\u79f0<\/strong><\/span><\/h3>\n
\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u5c06\u6240\u6709\u884c\u540d\u79f0\u66ff\u6362\u4e3a\u4ece 1 \u5f00\u59cb\u7684\u6574\u6570\u5217\u8868\uff1a<\/span><\/p>\n
 #change row names to a list of integers\n<\/span>row.names (mtcars) <- 1: nrow<\/span> (mtcars)\n\n#view first six row names of mtcars<\/em><\/span> \nhead(mtcars)\n\n   mpg cyl disp hp drat wt qsec vs am gear carb\n1 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4\n2 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4\n3 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1\n4 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1\n5 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2\n6 18.1 6 225 105 2.76 3,460 20.22 1 0 3 1\n<\/span><\/span><\/strong><\/pre>\n
\u60a8\u8fd8\u53ef\u4ee5\u4f7f\u7528paste()<\/strong>\u51fd\u6570\u5728\u6bcf\u884c\u540d\u79f0\u524d\u9762\u6dfb\u52a0\u4e00\u4e2a\u5355\u8bcd\uff1a<\/span><\/p>\n
 #change row names\n<\/span>row.names (mtcars) <- paste(\" row<\/span> \", 1: nrow<\/span> (mtcars))\n\n#view first six row names of mtcars<\/em><\/span> \nhead(mtcars)\n\n       mpg cyl disp hp drat wt qsec vs am gear carb\nrow 1 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4\nrow 2 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4\nrow 3 22.8 4 108 93 3.85 2.320 18.61 1 1 4 1\nrow 4 21.4 6 258 110 3.08 3.215 19.44 1 0 3 1\nrow 5 18.7 8 360 175 3.15 3.440 17.02 0 0 3 2\nrow 6 18.1 6 225 105 2.76 3.460 20.22 1 0 3 1\n<\/span><\/span><\/strong><\/pre>\n
\u8bf7\u6ce8\u610f\uff0c\u73b0\u5728\u6bcf\u4e00\u884c\u7684\u5f00\u5934\u90fd\u9644\u52a0\u4e86\u201cline\u201d\u4e00\u8bcd\u3002<\/span><\/p>\n
\u5176\u4ed6\u8d44\u6e90<\/strong><\/span><\/h3>\n
\u5982\u4f55\u5728 R \u4e2d\u68c0\u7d22\u884c\u53f7
\u5982\u4f55\u5728 R \u4e2d\u5411\u6570\u636e\u6846\u6dfb\u52a0\u884c<\/a>
\u5982\u4f55\u5728R\u4e2d\u9009\u62e9\u968f\u673a\u6837\u672c<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
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