How to get Number of Rows in Matrix in R

How to get Number of Rows in Matrix in R ?

To get the number of rows in a matrix in R, you can use the nrow() function, which returns the number of rows present in the given matrix.

In this example,

First, we create a 3x3 matrix named matrix1 using the matrix() function and specify the elements and dimensions. The matrix() function takes a vector of values and arranges them into the specified number of rows and columns.
We then use the nrow() function to get the number of rows in matrix1. The nrow() function takes the matrix as an argument and returns the number of rows.
The result, which is the number of rows, is stored in the variable numRows.
Finally, we print the value of numRows using the print() function to display the number of rows in the matrix.

matrix1 <- matrix(1:9, nrow = 3, ncol = 3)
numRows <- nrow(matrix1)
print(paste("Number of rows in matrix1 is:", numRows))

Number of rows in matrix1 is: 3

In this example,

First, we create a 4x2 matrix named matrix2 using the matrix() function and specify the elements and dimensions. The matrix() function takes a vector of values and arranges them into the specified number of rows and columns.
We then use the nrow() function to get the number of rows in matrix2. The nrow() function takes the matrix as an argument and returns the number of rows.
The result, which is the number of rows, is stored in the variable numRows.
Finally, we print the value of numRows using the print() function to display the number of rows in the matrix.

matrix2 <- matrix(1:8, nrow = 4, ncol = 2)
numRows <- nrow(matrix2)
print(paste("Number of rows in matrix2 is:", numRows))

Number of rows in matrix2 is: 4

In this example,

First, we create a 5x5 matrix named matrix3 using the matrix() function and specify the elements and dimensions. The matrix() function takes a vector of values and arranges them into the specified number of rows and columns.
We then use the nrow() function to get the number of rows in matrix3. The nrow() function takes the matrix as an argument and returns the number of rows.
The result, which is the number of rows, is stored in the variable numRows.
Finally, we print the value of numRows using the print() function to display the number of rows in the matrix.

matrix3 <- matrix(1:25, nrow = 5, ncol = 5)
numRows <- nrow(matrix3)
print(paste("Number of rows in matrix3 is:", numRows))

Number of rows in matrix3 is: 5

In this tutorial, we learned How to get Number of Rows in Matrix in R language with well detailed examples.