"R colMeans()"의 두 판 사이의 차이

2021년 4월 13일 (화) 22:47 기준 최신판

1 개요[ | ]

R colMeans()

"열 평균", "세로 평균"
Form Column Means

df <- read.table( header=TRUE, stringsAsFactors=FALSE, text="
English Math Science
30      60   99
40      70   88
50      80   77
60      90   66
70      90   55
")
df

colMeans(df)

sapply(df, mean)

apply(df, 2, mean)

2 같이 보기[ | ]

3 참고[ | ]

https://www.rdocumentation.org/packages/base/versions/3.6.1/topics/colSums

@@ 1번째 줄: / 1번째 줄: @@
 ==개요==
 ;R colMeans()
+* "열 평균", "세로 평균"
+* Form Column Means
-<source lang='r'>
+<syntaxhighlight lang='r' notebook>
-mydf <- read.table( header=TRUE, stringsAsFactors=FALSE, text="
+df <- read.table( header=TRUE, stringsAsFactors=FALSE, text="
-English Math
+English Math Science
-  60
+     60   99
-   70
+      70   88
-  80
+     80   77
-  90
+     90   66
+     90   55
 ")
-mydf
+df
-##   English Math
+</syntaxhighlight>
-## 1      90   60
+<syntaxhighlight lang='r' notebook>
-## 2      80   70
+colMeans(df)
-## 3      70   80
+</syntaxhighlight>
-## 4      60   90
+<syntaxhighlight lang='r' notebook>
+sapply(df, mean)
-colMeans(mydf)
+</syntaxhighlight>
-## English    Math
+<syntaxhighlight lang='r' notebook>
-##      75      75
+apply(df, 2, mean)
+</syntaxhighlight>
-sapply(mydf, mean)
-## English    Math
-##      75      75
-</source>
 ==같이 보기==
 * [[R mean()]]
+* [[R apply()]]
+* [[R sapply()]]
 * [[R colSums()]]
 * [[R rowMeans()]]
 ==참고==
-* https://www.rdocumentation.org/packages/base/versions/3.6.0/topics/colSums
+* https://www.rdocumentation.org/packages/base/versions/3.6.1/topics/colSums
 [[분류: R base]]