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

Get the number of columns of an Object in R Programming – ncol() Function

Last Updated : 26 Feb, 2021

ncol() function in R Language is used to return the number of columns of the specified matrix.

Syntax: ncol(x)
Parameters:
x: matrix, vector, array or data frame

Example 1:

Python3

# R program to illustrate
# ncol function
 
# Getting R Biochemical Oxygen Demand Dataset
BOD 
 
# Calling ncol() function to
# get the number of columns
ncol(BOD) 

Output:

  Time demand
1    1    8.3
2    2   10.3
3    3   19.0
4    4   16.0
5    5   15.6
6    7   19.8

[1] 2

Example 2:

Python3

# R program to illustrate
# ncol function
 
# Specifying a matrix
x <- matrix(c(1, 2, 3, 4), 2, 2)
 
# Calling the ncol() function
ncol(x)

Output:

[1] 2

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

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