这是我的数据
x i
1 D W MCMILLAN MEMORIAL HOSPITAL AL
2 <NA> AK
3 JOHN C LINCOLN DEER VALLEY HOSPITAL AZ
4 ARKANSAS METHODIST MEDICAL CENTER AR
5 SHERMAN OAKS HOSPITAL CA
6 SKY RIDGE MEDICAL CENTER CO
7 MIDSTATE MEDICAL CENTER CT
8 <NA> DE
9 <NA> DC
10 SOUTH FLORIDA BAPTIST HOSPITAL FL
11 UPSON REGIONAL MEDICAL CENTER GA
12 <NA> HI
13 LOST RIVERS DISTRICT HOSPITAL ID
14 JESSE BROWN VA MEDICAL CENTER - VA CHICAGO HEALTHCARE SYSTEM IL
15 COMMUNITY HOSPITAL IN
16 COVENANT MEDICAL CENTER IA
17 COFFEYVILLE REGIONAL MEDICAL CENTER KS
18 KING'S DAUGHTERS' MEDICAL CENTER KY
19 NORTH OAKS MEDICAL CENTER, LLC LA
20 RUMFORD HOSPITAL ME
21 CIVISTA MEDICAL CENTER MD
22 HEYWOOD HOSPITAL MA
23 GENESYS REGIONAL MEDICAL CENTER - HEALTH PARK MI
24 HEALTHEAST WOODWINDS HOSPITAL MN
25 MARION GENERAL HOSPITAL MS
26 LIBERTY HOSPITAL MO
27 FRANCES MAHON DEACONESS HOSPITAL MT
28 ALEGENT HEALTH MEMORIAL HOSPITAL NE
29 BANNER CHURCHILL COMMUNITY HOSPITAL NV
30 FRANKLIN REGIONAL HOSPITAL NH
31 CAPITAL HEALTH MEDICAL CENTER - HOPEWELL NJ
32 ESPANOLA HOSPITAL NM
33 METROPOLITAN HOSPITAL CENTER NY
34 MEDWEST HAYWOOD NC
35 LISBON AREA HEALTH SERVICES ND
36 CINCINNATI VA MEDICAL CENTER OH
37 JACKSON COUNTY MEMORIAL HOSPITAL OK
38 ST ALPHONSUS MEDICAL CENTER - BAKER CITY, INC OR
39 UPMC PASSAVANT PA
40 HOSPITAL METROPOLITANO DR TITO MATTEI PR
41 <NA> RI
42 PALMETTO HEALTH BAPTIST SC
43 BLACK HILLS SURGICAL HOSPITAL LLP SD
44 INDIAN PATH MEDICAL CENTER TN
45 NIX HEALTH CARE SYSTEM TX
46 BEAR RIVER VALLEY HOSPITAL UT
47 <NA> VT
48 <NA> VI
49 CARILION GILES COMMUNITY HOSPITAL VA
50 SWEDISH MEDICAL CENTER WA
51 PLATEAU MEDICAL CENTER WV
52 ST CROIX REG MED CTR WI
53 POWELL VALLEY HOSPITAL WY
54 <NA> GU
我想按列i排序此列表，但由于某种原因，它会在底部抛出GU。 我跑的时候
order(z$i)
（z是我的桌子） 我得到了这个结果
[1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
> str(z)
'data.frame': 54 obs. of 2 variables:
$ x: Factor w/ 46 levels "D W MCMILLAN MEMORIAL HOSPITAL",..: 1 NA 2 3 4 5 6 NA NA 7 ...
$ i: Factor w/ 54 levels "AL","AK","AZ",..: 1 2 3 4 5 6 7 8 9 10 ...
对我来说意味着它认为GU属于列表的底部。此外，列表顶部还有一个问题，AL在AK之前，AZ在AR之前。
有什么建议为什么会这样做？
由于
答案 0 :(得分：0)
z[order(as.character(z$i)), ]
会做到这一点。