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Get the number of rows of an Object in R Programming – nrow() Function

  • Last Updated : 09 Mar, 2021

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

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

Example 1: 
 

Python3




# R program to illustrate
# nrow function
 
# Getting R Biochemical Oxygen Demand Dataset
BOD
 
# Calling nrow() function to
# get the number of rows
nrow(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] 6

Example 2: 
 

Python3




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

Output: 
 

[1] 1

 

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