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descriptive_statistics

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Descriptive Statistics

Data 혹은 자료를 기술하는 (describe) 통계를 말한다. 아래는 R에 탑재되어 있는 trees라는 데이터인데 나무의 둘레와 (girth) 키 (height), 그리고 볼륨에 (volume) 관한 데이터가 기록되어 있다. 각 변인 (Girth, Height, Volume)의

  • minimum 값 (min)
  • median 값 (median)
  • mean 값 (mean)
  • max 값 (max) 등을 구해준다.
> trees
   Girth Height Volume
1    8.3     70   10.3
2    8.6     65   10.3
3    8.8     63   10.2
4   10.5     72   16.4
5   10.7     81   18.8
6   10.8     83   19.7
7   11.0     66   15.6
8   11.0     75   18.2
9   11.1     80   22.6
10  11.2     75   19.9
11  11.3     79   24.2
12  11.4     76   21.0
13  11.4     76   21.4
14  11.7     69   21.3
15  12.0     75   19.1
16  12.9     74   22.2
17  12.9     85   33.8
18  13.3     86   27.4
19  13.7     71   25.7
20  13.8     64   24.9
21  14.0     78   34.5
22  14.2     80   31.7
23  14.5     74   36.3
24  16.0     72   38.3
25  16.3     77   42.6
26  17.3     81   55.4
27  17.5     82   55.7
28  17.9     80   58.3
29  18.0     80   51.5
30  18.0     80   51.0
31  20.6     87   77.0
> 
> summary(trees)
     Girth           Height       Volume     
 Min.   : 8.30   Min.   :63   Min.   :10.20  
 1st Qu.:11.05   1st Qu.:72   1st Qu.:19.40  
 Median :12.90   Median :76   Median :24.20  
 Mean   :13.25   Mean   :76   Mean   :30.17  
 3rd Qu.:15.25   3rd Qu.:80   3rd Qu.:37.30  
 Max.   :20.60   Max.   :87   Max.   :77.00  
descriptive_statistics.1584479093.txt.gz · Last modified: 2020/03/18 06:04 by hkimscil

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