Getting a Matrix of number of rows in R Programming - row() Function

Getting a Matrix of number of columns in R Programming - col() Function

Last Updated : 03 Jun, 2020

col() function in R Language is used to get a matrix which contains the number of columns of the matrix passed to it as argument.

Syntax: col(x, as.factor=FALSE) Parameters: x: matrix as.factor: a logical value indicating whether the value should be returned as a factor of column labels (created if necessary) rather than as numbers

Example 1:

Python3

# R program to illustrate
# col function

# Initializing a matrix with
# 2 rows and 2 columns
x <- matrix(c(1, 2, 3, 4), 2, 2)

# Getting the matrix representation
x

# Calling the col() function
col(x)

Output:

     [, 1] [, 2]
[1, ]    1    3
[2, ]    2    4
     [, 1] [, 2]
[1, ]    1    2
[2, ]    1    2

Example 2:

Python3

# R program to illustrate
# col function

# Initializing a matrix with
# 3 rows and 3 columns
x <- matrix(rep(1:9), 3, 3)

# Getting the matrix representation
x

# Calling the col() function
col(x)

Output:

     [, 1] [, 2] [, 3]
[1, ]    1    4    7
[2, ]    2    5    8
[3, ]    3    6    9

     [, 1] [, 2] [, 3]
[1, ]    1    2    3
[2, ]    1    2    3
[3, ]    1    2    3

Getting a Matrix of number of rows in R Programming - row() Function

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