R matrix()

1 개요

R matrix()

matrix( c(1,2,3,4,5,6), 2, 3)
##      [,1] [,2] [,3]
## [1,]    1    3    5
## [2,]    2    4    6
matrix( c(1,2,3,4,5,6), 3, 2)
##      [,1] [,2]
## [1,]    1    4
## [2,]    2    5
## [3,]    3    6

A <- matrix( c(1,2,3,4,5,6), nrow=2, ncol=3)
class(A)
## [1] "matrix"
str(A)
##  num [1:2, 1:3] 1 2 3 4 5 6
A
##      [,1] [,2] [,3]
## [1,]    1    3    5
## [2,]    2    4    6

A <- matrix( c(1,2,3,4,5,6), nrow=2, ncol=3, byrow=TRUE)
class(A)
## [1] "matrix"
str(A)
##  num [1:2, 1:3] 1 4 2 5 3 6
A
##      [,1] [,2] [,3]
## [1,]    1    2    3
## [2,]    4    5    6

2 같이 보기

• R 행렬
• R dim()
• R diag()
• R colSums()
• R rowSums()