R dplyr列与字母数字字符排序

Question

dplyr当数字和字母字符组成时,为什么不对第一列进行正确排序？

> library(dplyr)
> y <- read.table("file.csv", sep = ",")
> arrange(y, V1)
   V1         V2         V3         V4         V5         V6
1   1 0.97348999 0.11047091 0.95841014 0.61826620 0.43164420
2  10 0.82178167 0.21619067 0.11993356 0.06335101 0.28703842
3  11 0.35952632 0.27595845 0.24760335 0.63887200 0.47491472
4  12 0.43775624 0.08852486 0.06870304 0.63670202 0.55432641
5  13 0.83894086 0.40484966 0.96735507 0.86764578 0.02588688
6  14 0.95258399 0.65029909 0.97183605 0.87688243 0.97729517
7  15 0.62839615 0.52999000 0.05722874 0.40709867 0.56039580
8   2 0.22754619 0.16812359 0.39432991 0.68562992 0.43066861
9   3 0.33318220 0.21108688 0.60911213 0.64475379 0.98617404
10  4 0.57208511 0.58709229 0.29435093 0.78603855 0.81185551
11  5 0.35548490 0.15229426 0.42423263 0.72963238 0.04401239
12  6 0.08575802 0.33310521 0.09671737 0.90820671 0.33289880
13  7 0.05743798 0.20439928 0.56411860 0.54859270 0.81053637
14  8 0.99056584 0.29960046 0.20765701 0.45722997 0.51354034
15  9 0.35839568 0.11667019 0.56498996 0.43971051 0.23968955
16  A 0.25645249 0.07045102 0.17046681 0.75700118 0.50269449
17  B 0.57722865 0.31544398 0.33129932 0.44173772 0.11600295
18  C 0.94242373 0.55745376 0.01542128 0.01723924 0.11413310

我想看:

   V1         V2         V3         V4         V5         V6
1   1 0.97348999 0.11047091 0.95841014 0.61826620 0.43164420
2   2 0.22754619 0.16812359 0.39432991 0.68562992 0.43066861
3   3 0.33318220 0.21108688 0.60911213 0.64475379 0.98617404
4   4 0.57208511 0.58709229 0.29435093 0.78603855 0.81185551
5   5 0.35548490 0.15229426 0.42423263 0.72963238 0.04401239
6   6 0.08575802 0.33310521 0.09671737 0.90820671 0.33289880
7   7 0.05743798 0.20439928 0.56411860 0.54859270 0.81053637
8   8 0.99056584 0.29960046 0.20765701 0.45722997 0.51354034
9   9 0.35839568 0.11667019 0.56498996 0.43971051 0.23968955
10 10 0.82178167 0.21619067 0.11993356 0.06335101 0.28703842
11 11 0.35952632 0.27595845 0.24760335 0.63887200 0.47491472
12 12 0.43775624 0.08852486 0.06870304 0.63670202 0.55432641
13 13 0.83894086 0.40484966 0.96735507 0.86764578 0.02588688
14 14 0.95258399 0.65029909 0.97183605 0.87688243 0.97729517
15 15 0.62839615 0.52999000 0.05722874 0.40709867 0.56039580
16  A 0.25645249 0.07045102 0.17046681 0.75700118 0.50269449
17  B 0.57722865 0.31544398 0.33129932 0.44173772 0.11600295
18  C 0.94242373 0.55745376 0.01542128 0.01723924 0.11413310

Answer 1

你对alpha的忽视有点问题,但如何:

library(dplyr)
arrange(y, as.numeric(V1))
# Warning in order(as.numeric(y$V1)) : NAs introduced by coercion
#    V1         V2         V3         V4         V5         V6
# 1   1 0.97348999 0.11047091 0.95841014 0.61826620 0.43164420
# 8   2 0.22754619 0.16812359 0.39432991 0.68562992 0.43066861
# 9   3 0.33318220 0.21108688 0.60911213 0.64475379 0.98617404
# 10  4 0.57208511 0.58709229 0.29435093 0.78603855 0.81185551
# 11  5 0.35548490 0.15229426 0.42423263 0.72963238 0.04401239
# 12  6 0.08575802 0.33310521 0.09671737 0.90820671 0.33289880
# 13  7 0.05743798 0.20439928 0.56411860 0.54859270 0.81053637
# 14  8 0.99056584 0.29960046 0.20765701 0.45722997 0.51354034
# 15  9 0.35839568 0.11667019 0.56498996 0.43971051 0.23968955
# 2  10 0.82178167 0.21619067 0.11993356 0.06335101 0.28703842
# 3  11 0.35952632 0.27595845 0.24760335 0.63887200 0.47491472
# 4  12 0.43775624 0.08852486 0.06870304 0.63670202 0.55432641
# 5  13 0.83894086 0.40484966 0.96735507 0.86764578 0.02588688
# 6  14 0.95258399 0.65029909 0.97183605 0.87688243 0.97729517
# 7  15 0.62839615 0.52999000 0.05722874 0.40709867 0.56039580
# 16  A 0.25645249 0.07045102 0.17046681 0.75700118 0.50269449
# 17  B 0.57722865 0.31544398 0.33129932 0.44173772 0.11600295
# 18  C 0.94242373 0.55745376 0.01542128 0.01723924 0.11413310

这也适用于base:

y[ order(as.numeric(y$V1)), ]

编辑:OP然后问(deSpite!说" 我真的不在乎 ";-)如何对非数字字段进行排序.

第一个命令工作的原因是非数字字段都被转换为NA,这可以方便地将它们放在排序中的数字之后.同时,双方dplyr::arrange并base::order采取任意参数,其中第一列的关系是由第二个参数的处理等,所以,为了在中排序NAS(非数字V1元素),只需要添加一些有意义他们当中,如......"他们":

arrange(y, as.numeric(V1), V1)
y[ order(as.numeric(y$V1), y$V1), ]