使用 R [重复] 更改数据框中列的顺序
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【中文标题】使用 R [重复] 更改数据框中列的顺序【英文标题】：Change the order of the columns in a dataframe using R [duplicate] 【发布时间】：2013-04-09 11:45:33 【问题描述】：我有一个数据如下：
nnn <- structure(list(JulDay = c(260.0208435, 260.0416565, 260.0625,
260.0833435, 260.1041565, 260.125), i46j8k1 = c(17.99964905,
18.5903511, 22.93223381, 25.75687981, 25.78559113, 25.8169651
), i47j8k1 = c(18.36571884, 21.15985107, 24.80698013, 25.75730324,
25.78366089, 25.65381622), i48j8k1 = c(18.45543289, 22.02331543,
24.99463654, 25.5712738, 25.64232635, 25.66119385), i46j8k2 = c(17.99798965,
18.60897827, 22.95389748, 25.75719261, 25.78653336, 25.81692505
), i47j8k2 = c(18.36762619, 21.17233467, 24.82248497, 25.75767899,
25.7840023, 25.64115906), i48j8k2 = c(18.45938683, 22.04619026,
24.9859066, 25.56440544, 25.63998032, 25.66089439), i46j8k3 = c(17.99430084,
17.92090797, 19.67384911, 21.70389938, 23.67287827, 24.04380417
), i47j8k3 = c(18.36631203, 19.82550049, 21.42166328, 23.76496887,
24.87460899, 25.41026688), i48j8k3 = c(18.44684792, 20.60981369,
22.68632317, 24.1877079, 25.12503052, 24.99880028), i46j8k4 = c(17.98368073,
17.92047691, 18.11532974, 18.67082596, 20.23210907, 21.7181263
), i47j8k4 = c(18.33089066, 18.41581535, 18.53464127, 19.18972206,
20.14752388, 20.11002922), i48j8k4 = c(18.21522522, 18.52231598,
19.21397209, 19.58755302, 20.11982536, 21.28104591)), .Names = c("JulDay",
"i46j8k1", "i47j8k1", "i48j8k1", "i46j8k2", "i47j8k2", "i48j8k2",
"i46j8k3", "i47j8k3", "i48j8k3", "i46j8k4", "i47j8k4", "i48j8k4"
), row.names = c(NA, 6L), class = "data.frame")
> nnn
JulDay i46j8k1 i47j8k1 i48j8k1 i46j8k2 i47j8k2 i48j8k2 i46j8k3 i47j8k3 i48j8k3 i46j8k4 i47j8k4 i48j8k4
1 260.0208 17.99965 18.36572 18.45543 17.99799 18.36763 18.45939 17.99430 18.36631 18.44685 17.98368 18.33089 18.21523
2 260.0417 18.59035 21.15985 22.02332 18.60898 21.17233 22.04619 17.92091 19.82550 20.60981 17.92048 18.41582 18.52232
3 260.0625 22.93223 24.80698 24.99464 22.95390 24.82248 24.98591 19.67385 21.42166 22.68632 18.11533 18.53464 19.21397
4 260.0833 25.75688 25.75730 25.57127 25.75719 25.75768 25.56441 21.70390 23.76497 24.18771 18.67083 19.18972 19.58755
5 260.1042 25.78559 25.78366 25.64233 25.78653 25.78400 25.63998 23.67288 24.87461 25.12503 20.23211 20.14752 20.11983
6 260.1250 25.81697 25.65382 25.66119 25.81693 25.64116 25.66089 24.04380 25.41027 24.99880 21.71813 20.11003 21.28105
我想改变dataframe的顺序如下：
JulDay i46j8k1 i46j8k2 i46j8k3 i46j8k4 i47j8k1 i47j8k2 i47j8k3 i47j8k4 i48j8k1 i48j8k2 i48j8k3 i48j8k4
谁能建议我该怎么做？
谢谢。
【问题讨论】：
只需：nnn[, c("col1", "col2")] 其中c(.) 是您显示的所需列顺序。
感谢阿伦。它解决了这个问题。你能在答案上写同样的话，以便我可以接受。
jdbaba，你可以自己写答案并标记为已回答，我完全没问题。
【参考方案1】：
dataframe的顺序可以改变如下：
new<- nnn[,c("JulDay","i46j8k1","i46j8k2","i46j8k3","i46j8k4","i47j8k1","i47j8k2","i47j8k3","i47j8k4",
"i48j8k1","i48j8k2","i48j8k3","i48j8k4")]
感谢 Arun 的建议。
【讨论】：
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