"R table()"의 두 판 사이의 차이

2021년 10월 26일 (화) 19:38 기준 최신판

1 개요[ | ]

R table()

2 벡터[ | ]

x <- c(3,1,4,1,5,2,6,5)
table(x)

table( c(3,1,4,1,5,2,6,5) )

table( c("a","b","b","c","c","c","d") )

3 데이터프레임 컬럼[ | ]

table(iris$Species)

v <- c(1, 'hello', 1, 'world', 'hello')
table(v)

summary(warpbreaks)

table(warpbreaks$wool,warpbreaks$tension)

scores <- read.table( header=TRUE, stringsAsFactors=FALSE, text="
Class  Name variable value
    A Alice  English    90
    A   Bob  English    80
    B  Dave  English    60
    A Alice     Math    60
    B Carol     Math    80
    B  Dave     Math    90
")
table( scores$variable )

table( scores$value )

4 table()과 ddply()[ | ]

library(plyr)
table(baseball[1:100,]$year)

ddply(baseball[1:100,], ~year, nrow)

ddply(baseball[1:100,], 'year', nrow)

ddply(baseball[1:100,], .(year), nrow)

5 같이 보기[ | ]

6 참고[ | ]

https://www.rdocumentation.org/packages/base/versions/3.5.3/topics/table

@@ 1번째 줄: / 1번째 줄: @@
 ==개요==
 ;R table()
-{{소스헤더|벡터}}
-<source lang='r'>
+==벡터==
+<syntaxhighlight lang='r' run>
 x <- c(3,1,4,1,5,2,6,5)
 table(x)
-## x
+</syntaxhighlight>
-## 1 2 3 4 5 6
+<syntaxhighlight lang='r' run>
-## 2 1 1 1 2 1
-</source>
-<source lang='r'>
 table( c(3,1,4,1,5,2,6,5) )
-##
+</syntaxhighlight>
-## 1 2 3 4 5 6
+<syntaxhighlight lang='r' run>
-## 2 1 1 1 2 1
+table( c("a","b","b","c","c","c","d") )
-</source>
+</syntaxhighlight>
-{{소스헤더|데이터프레임$컬럼}}
-<source lang='r'>
+==데이터프레임 컬럼==
+<syntaxhighlight lang='r' notebook>
+table(iris$Species)
+</syntaxhighlight>
+<syntaxhighlight lang='r' notebook>
 v <- c(1, 'hello', 1, 'world', 'hello')
 table(v)
-## v
+</syntaxhighlight>
-##     1 hello world
+<syntaxhighlight lang='r' notebook>
-##     2     2     1
-</source>
-<source lang='r'>
 summary(warpbreaks)
-##     breaks      wool   tension
+</syntaxhighlight>
-## Min.   :10.00   A:27   L:18
+<syntaxhighlight lang='r' notebook>
-## 1st Qu.:18.25   B:27   M:18
-## Median :26.00          H:18
-## Mean   :28.15
-## 3rd Qu.:34.00
-## Max.   :70.00
 table(warpbreaks$wool,warpbreaks$tension)
-##
+</syntaxhighlight>
-##   L M H
+<syntaxhighlight lang='r' notebook>
-## A 9 9 9
-## B 9 9 9
-</source>
-<source lang='r'>
 scores <- read.table( header=TRUE, stringsAsFactors=FALSE, text="
 Class  Name variable value
@@ 49번째 줄: / 38번째 줄: @@
      B  Dave     Math    90
 ")
-scores
-##   Class  Name variable value
-## 1     A Alice  English    90
-## 2     A   Bob  English    80
-## 3     B  Dave  English    60
-## 4     A Alice     Math    60
-## 5     B Carol     Math    80
-## 6     B  Dave     Math    90
 table( scores$variable )
-## English    Math
+</syntaxhighlight>
-##       3       3
+<syntaxhighlight lang='r' notebook>
+table( scores$value )
+</syntaxhighlight>
-table( scores$value )
+==table()과 ddply()==
-## 60 80 90
+<syntaxhighlight lang='r' notebook=3>
-##  2  2  2
-</source>
-{{소스헤더|table()과 ddply()}}
-<source lang='r'>
 library(plyr)
 table(baseball[1:100,]$year)
-##
+</syntaxhighlight>
-## 1871 1872 1873 1874 1875 1876 1877 1878
+<syntaxhighlight lang='r' notebook=3>
-##    7   13   13   15   17   15   17    3
 ddply(baseball[1:100,], ~year, nrow)
+</syntaxhighlight>
+<syntaxhighlight lang='r' notebook=3>
 ddply(baseball[1:100,], 'year', nrow)
+</syntaxhighlight>
+<syntaxhighlight lang='r' notebook=3>
 ddply(baseball[1:100,], .(year), nrow)
-##   year V1
+</syntaxhighlight>
-## 1 1871  7
-## 2 1872 13
-## 3 1873 13
-## 4 1874 15
-## 5 1875 17
-## 6 1876 15
-## 7 1877 17
-## 8 1878  3
-</source>
 ==같이 보기==
+{{z컬럼3|
+* [[R xtabs()]]
+* [[R ddply()]]
+* [[R factor()]]
+* [[R ftable()]]
+* [[R unique()]]
+* [[R is.table()]]
+* [[R as.table()]]
 * [[R tabulate()]]
-* [[R ftable()]]
+* [[R summary()]]
-* [[R factor()]]
-* [[R xtabs()]]
-* [[R margin.table()]]
 * [[R prop.table()]]
 * [[R addmargins()]]
-* [[R summary()]]
+* [[R margin.table()]]
-* [[R ddply()]]
+* [[R 분할표]]
+* [[R 그룹별 건수 구하기]]
 * [[함수 array_count_values()]]
+}}
 ==참고==