的R - 爲了功能

這裏是我的數據的R - 爲了功能

               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

我要訂購此列表中列我，但由於某些原因，它在底部拋出GU。當我運行

order(z$i)

（z是我的表）我得到這個結果

[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 ...

這對我意味着它認爲GU屬於在列表的底部。在列表頂部還有一個問題，AL在AK之前，AZ在AR之前。

任何建議爲什麼會這樣做？

感謝

來源

2014-09-11 user2343837

看起來像數據框而不是列表。我懷疑你正在處理一個因素，並且想要處理一個角色。 – JeremyS 2014-09-11 06:54:58

'levels（z）'的輸出是什麼？ – nico 2014-09-11 07:22:34

是的，這是一個df。級別（z）返回null。每當col x有NAs時似乎都有問題 – user2343837 2014-09-11 07:28:56

z[order(as.character(z$i)), ]

會做的伎倆。

來源

2014-09-11 08:42:04

的R - 爲了功能

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