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

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

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

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